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Eugen Bogodistov
เข้าร่วมเมื่อ 11 พ.ย. 2009
My contact: eugenleo(g)gmail.com, skype: eugentango
DCE: Calculating Willingness to Pay (Willingness to Trade ...). Part 2 (Errata!!!)
Hello!
This video is an add-on to my previous video (th-cam.com/video/LxbVIXNHZqY/w-d-xo.html) as I made a mistake in my calculations. Sorry for that and good luck with your research!
Best
Eugene (Yevgen)
This video is an add-on to my previous video (th-cam.com/video/LxbVIXNHZqY/w-d-xo.html) as I made a mistake in my calculations. Sorry for that and good luck with your research!
Best
Eugene (Yevgen)
มุมมอง: 14
วีดีโอ
DCE: Calculating Willingness to Pay (Willingness to Trade ...). Part 1.
มุมมอง 1019 ชั่วโมงที่ผ่านมา
Errata: I made a small mistake, here is the correction: th-cam.com/video/QKBpbvA1TQU/w-d-xo.html Hello everybody, I followed the request of one of my guests who asked me to explain the WTP calculation. And here is the presentation of the paper I am referring to: th-cam.com/video/mCFe0sEUm58/w-d-xo.html Enjoy and subscribe! Best Eugene (Yevgen)
AOM Presentation "What If AI-related Values Go at Odds with Each Other? An Experimental Study"
มุมมอง 28วันที่ผ่านมา
This is the presentation of our #AOM2024 paper: "What If AI-related Values Go at Odds with Each Other? An Experimental Study" by Yevgen Bogodistov, Markus Frischhut, Ganna Pogrebna, and Petar Despotovic. We discuss #ethicalAI and what it means to have #ai that is #ethical. Mainly, we focus on the #contrarianthinking perspective - what if some #societal #values got at odds with each other. Enjoy...
DCE Variables Coding Simply Explained
มุมมอง 40วันที่ผ่านมา
Welcome! I received several requests regarding #variable #coding. Some people use other software, some people use three #decision options instead of two (my usual #DCE format), or they may have "None of the suggested options". In this video, I explain the logic behind #variablecoding. Please watch my video on restructuring afterwards. #Restructuring and coding: th-cam.com/video/HBaFicxTiqI/w-d-...
Price of Progress: Micro Credentialing Systems Powered by Blockchain Technology - AOM 2025 Presi
มุมมอง 1314 วันที่ผ่านมา
This is our presentation for our recently accepted Academy of Management Paper: "Price of Progress: Micro Credentialing Systems Powered by Blockchain Technology". Authors: Lyubov Stafyeyeva, Yevgen Bogodistov, Guido Perscheid. #aom2024
Implicit Association Test using IATGen + Qualtrics
มุมมอง 18หลายเดือนก่อน
Welcome! In this video, I show how to conduct an #implicit #association #test using #qualtrics and #iatgen plugin. I also show how to analyse results using the iatgen website. With this test, you can investigate #assiciations, #prejudices, and #stereotypes. Enjoy! Information about the tool: iatgen.wordpress.com/ Tool for IAT creation and analysis: iatgen.org/ Citation for the tool: Carpenter, ...
Implicit Association Test using FreeIAT
มุมมอง 11หลายเดือนก่อน
In this video, I explain how to make a #prejudice or #stereotype #investigation using #implicit #association #test. Please watch my previous video about the #theory behind it. FreeIAT: meade.wordpress.ncsu.edu/freeiat-home/ FreeIAT Results interpretation: meade.wordpress.ncsu.edu/freeiat-home/freeiat-how-it-works/ GitHub for FreeIAT: github.com/awmeade/FreeIAT/releases/tag/1.3.3 Our paper with ...
How to make a practitioners' report from your thesis
มุมมอง 18หลายเดือนก่อน
This video is for my (and any other) #students who want to share the results of their thesis with the #practitioners. I show my #researchreport and explain the logic behind it. Enjoy and share - it does matter!
How to defend your thesis: some recommendations
มุมมอง 1042 หลายเดือนก่อน
In this short video, I try to give you some #advice on how to #defend your #thesis. This video is mainly of use to our students but the other universities' students may also need it. Enjoy!
How to conduct SWOT analysis correctly and how to avoir main mistakes.
มุมมอง 1514 หลายเดือนก่อน
Welcome! I am a big opponent of the SWOT analysis. And there is a reason for this - students and practitioners seldom conduct this analysis correctly. In this video, I share with you some suggestions regarding a rigorous SWOT analysis. Good luck and feel free to share your opinion regarding a high-quality SWOT. Best Eugene (Yevgen)
DCE: An Automated Fast Restructuring
มุมมอง 855 หลายเดือนก่อน
This video is the help to my doctoral students who run now the manual restructuring in parallel. We can then compare the results and see that we are on the same page. This video is also an example of how to use my plugin. Mored details about the plugin in this video: th-cam.com/video/NLP2tybpjjU/w-d-xo.htmlsi=yhIY7LCuU3gtlZcZ Manual data restructuring, here: th-cam.com/video/HBaFicxTiqI/w-d-xo....
Stress Free Exams and Presentations
มุมมอง 1566 หลายเดือนก่อน
This is a video on stress reduction for those who have to present or attend an exam. In this video, I share with you some techniques that will help you get calm and feel yourself competent. Enjoy! Best Eugene Links from the presentation: However, the more often you meditate, thefaster it goes th-cam.com/video/nGe3EY9ccjY/w-d-xo.html By the way, look how Sir Ken Robinson starts his presentation ...
Discrete Choice Exeriment: Hypotheses Formulation & Research Model
มุมมอง 1477 หลายเดือนก่อน
In this video, I explain how you formulate hypotheses for a DCE. You can have hypotheses with direct or moderating effects. I also show how to make a nice research model for your academic work. Papers that I refer to: Bogodistov, Y., & Ostern, N. K. (2019). Digitization at Any Cost? Willingness to Trade Efficiency for Organizational, Human, and Relational Costs. AMCIS 2019 Proceedings. aisel.ai...
Discrete Choice Experiment: How To Write Methodology Section
มุมมอง 2537 หลายเดือนก่อน
In this video, I explain how I describe DCE in my methodology sections. You can download my papers to see the texts I am commenting on. 1. Schwaiger, A., Bogodistov, Y., & Beimborn, D. (2023). Seeing the Forest for the Trees: How Abstract Thinking Fosters Digitalization. Academy of Management Annual Meeting Proceedings, 2023, 13995. (www.researchgate.net/publication/372820054_Seeing_the_Forest_...
Theory: What it is and what it is not. Differences between theorising, theory, view, model, notion.
มุมมอง 1147 หลายเดือนก่อน
This video is made for my students to help them understand how to implement a theory in their theses. The level is Bachelor and Master, so, if you are at a PhD level, you may need a deeper understanding of the recent discussion about theory development. Good luck with your theses!
Marginal Effects, Probability, and Odds Ratio in SPSS and Stata. Discrete Choice Experiment
มุมมอง 1.5K10 หลายเดือนก่อน
Marginal Effects, Probability, and Odds Ratio in SPSS and Stata. Discrete Choice Experiment
DCE Automation for SPSS Analysis Preparation
มุมมอง 100ปีที่แล้ว
DCE Automation for SPSS Analysis Preparation
Evidence-based Personas (Profiling) Based on a DCE
มุมมอง 93ปีที่แล้ว
Evidence-based Personas (Profiling) Based on a DCE
Implicit Association Test: An Introduction
มุมมอง 57ปีที่แล้ว
Implicit Association Test: An Introduction
DCE: Checking interaction of the participant's characteristics with attrbitues from DCE
มุมมอง 86ปีที่แล้ว
DCE: Checking interaction of the participant's characteristics with attrbitues from DCE
DCE: Checking that the responses are real
มุมมอง 68ปีที่แล้ว
DCE: Checking that the responses are real
DCE: Coding attributes with the same levels
มุมมอง 106ปีที่แล้ว
DCE: Coding attributes with the same levels
Discrete Choice-based vs Menu-based Modelling
มุมมอง 100ปีที่แล้ว
Discrete Choice-based vs Menu-based Modelling
sir i am doing dce and 8 choice sets were be given to respondents to answer. i want to know how all these 8 sets i will analyse. please help and thank you
@@manishakumari-tw7sp th-cam.com/video/Ug7vzUXGIQk/w-d-xo.htmlsi=xogJRfKAVfHP02fp Try this video, it should help coding. The analysis is explained in the other video on "fast analysis". Just scroll through my DCE playlist.
@@manishakumari-tw7sp for the analysis after restructuring th-cam.com/video/HBaFicxTiqI/w-d-xo.htmlsi=62bcJdErVcTWlkr6
@@eugenleo thank you sir
Thank you so much Sir for making this video for those who are working with DCE. This really is a great help for us.
@@sameer2835 welcome!
Hi, glad to know your channel, it's very helpful. I'm doing a DCE study and have some questions. In my study there are 6 attributes, all of which are categorical variables. There are 5 attributes that are characteristics of the drug and 1 attribute is cost. I use conditional logit model and want to calculate willingness to pay (WTP). I'm using STATA software, can you make a video tutorial on how to calculate willingness to pay (WTP) in STATA? Thanks a lot
Yes and no. I can make a video on Stata, but it will not help - the WTP is calculated in Excel. It is just a 'conversion' of one B value in anther one. So, you just need to copy the final table from Stata into Excel, and apply the formula. I am sure, I had a video on this in my DCE playlist. Good luck!
I have just amde a video on this. Enjoy: th-cam.com/video/LxbVIXNHZqY/w-d-xo.html
And here a small mistake correction: th-cam.com/video/QKBpbvA1TQU/w-d-xo.html
Dear Eugen, thank you for this amazing video! It was really helpful for us to get an overview on how to analyze our discrete choice analysis. We are left with one question. Maybe you can help us: How does the analysis procedure differ, if we showed three final products, instead of two, to the participants (so the participants had to decide to pick one of three different products with different attributes several times). Maybe you have some idea or inspiration for us or even have experience with this structure. Have a nice week and best wishes. Soraya
The difference is minimal - you will have to calculate the final_decision differently as you have the values 0, 1, 2 and not only 0 and 1. And restructuring second part- you will have 3 options seen, so put three variables in one category. Otherwise, all the same!
Sorry, both parts of restructuring need to be adapted. But the logic is the same.
@@eugenleo Thank you so much for your quick answer! This is really helpful. :) Am I right that we would need to do a multinomial logistic regression instead of a binary logistic regression in this case, because we have three possible values for final_decision?
No, the variable final_decision will be binary (1 - the want the option, 0 - they don't want it). So, it will be a binary logistic regression, I think.
I recorded a new video, explaining the process. Enjoy: th-cam.com/video/Ug7vzUXGIQk/w-d-xo.html
This step-by-step was very helpful. When I attempt to Test the Web Service in Qualtrics, it says the link returned no fields. Any idea what could be the problem? My URL works in the browser
I encountered this issue newly - Qualtrics wanted to have SSL protocol activated (). It added an 's' to http and the link stopped working. So, I've bought an SSL from my hosting provider. Otherwise, it can be the issue of a typo in the address or similar. To check - try uploading a file to a different hosting. Alternatively, I had an issue with the free hosting - it add an advertisement to the link and only then forwards it to your php (zzz.com.ua made it last year). Qualtrics sees the wrong file then. Try a different hosting to check (you browser may block this pop-up, while Qualtrics cannot).
@@eugenleo Thanks. I'll see if there's another hosting option I can find besides the free one. I honestly don't get most of this stuff. New at Qualitrics and never done any coding. But I found a tab on my InfinityFree server for installing free Google Trust SSL certificate so I have a working https URL in browser. Qualtrics still returned no values but the raw data tab changed to "Web Service Error #60: SSL certificate problem: unable to get local issuer certificate". I'm guessing that's what I get for going with a free one.
@@gpupchurch17 no worries, you don't need any coding for this. In the worse case, send me your php file - I can try tomorrow if it works from my hosting.
Very cool! Congratulations!
I just ran your script for a second time with new data, and again it works. I had some snag because for some reason SPSS imported the F-1-1 etc. variables as F11 - but I manually changed it in the syntax and then it ran smoothly.
The message or philosophy of this clip and song is hope.
Dear Eugen, You are a lifesaver. Amazing. I am so glad I found your channel.
Welcome! Watch 1-2 videos more - I sometimes make mistakes and refer to them in next videos. Enjoy!
I surely will. I am going to get addicted to this channel. @@eugenleo
This honestly helps so much, trying to understand how to have a domain and then being able to access the php files is way to difficult to understand. I was struggling for multiple hours trying to understand how to do it.
Please watch the next video, as I made a mistake in this one. In the next, I explain why variables did not appear in the SPSS file ;)
And the option with php-file is actually easier to handle. Bit confusing because of the server, but later in the next stages.
Hello, thanks for such a detailed video. I have a question do you know what to when we use choice cards as a picture including atributes and levels. and in the qualtrics, the data that we have is only option A, B and neither. so how can I link the attributes to these options? thanks
Well... This is now a lot of manual work. Practically, you need to create a set of variables for each level within each attribute. It is what I show in the second part of the video. Then, you manually code them for each participant - has s/he seen the level - 1, if not - 0. These dummies will be your independent variables, and the decision - dependent. In the same way you code your dependent variable - if decision option selected - 1, if not - 0. I did it in this way once. It took a while but it is possible. For insurance, if all participants saw the same card - you can code dummies for all participants for this card. Good luck and be patient;)
Great Video! A lot of information.....Thank You - Almost failed student😀
You are very welcome! 😉
Thank you very much for the video and the extra support. It is so much appreciated!!
Welcome! Good luck with your study!
Thank you Eugen! 👍
For R, use the package marginaleffects with the function marginaleffects (which you apply on the regression results). "Margins" didn't work for my dataset. So for example if your regression is awesome <- glm(final_decision~attribute1+attribute2+attribute3, data=cool_data, family = "binomial") Then you see the marginal effects by doing showme <-marginaleffects(awesome) summary(showme)
Thank you for your interesting video. I have the same question with the research group in your video. How can I know which is the best project should I suggest if I have 3 attributes(3 levels for each attribute) or should I make the combination for every two attribute levels then compare? Thank you!
I hope I understand your question correctly: you want two compare two groups of responses, e.g. male vs female participants in their preferences (or whatever other "external" variable you can use). In this event, you just split the file based on your grouping variable. When splitting, you can select what should be done with the groups. Click "compare groups". However, your question can be also understood differently - that you want to create groups from DCE attributes and levels. In this event, I assume that you want to investigate moderation effects of one attribute for another one. If so, don't split the file. Add as you independent variables, e.g., attribute1, attribute2, and their interaction attribute1*attribute2. Pay attention that in order to investigate interaction of two attributes you will need to look at all possible interactions of all levels. It sounds complex but it is simple - just add all possible combinations of levels to analysis: attr1lvl1*attr2lvl1, attr1lvl1*attr2lvl2, ... attrNlvlN*attrKlvlK. If I did not understand your question, you can contact me with an explanation.
Thank you so much for your reply. Sorry for the confusing question. My idea is that I give out several choice sets for the respondents to make a choice. For example, Car 1: black, auto gear, $15k; Car 2: white, auto gear, $20k; Car 3: red, normal gear, $13k and so on. Finally, which set (car) or sets (cars) that I should suggest to my boss to produce or sell? The analysis show which attribute level is preferred. However, the combination of all good may be not good (for the customer or producer). Is it right that I can make the interaction of 3 attributes: (attri1 * attr2 * attri 3) by looking at all possible interactions of all levels of these 3 levels. Thank you for your help and your time.
@@user-dv5me2vf3l There are several things that you can show: 1. Look at the most preferred levels for each attribute and pull them to one object, e.g. red car, automatic gear, 15k. This would be the optimal way to show what are most desired aspects. 2. You can have interactions (if this was your theory). E.g. if the engine is not sufficiently powerful, an air conditionair might be useless. So, there might be interaction between two attributes. In this event, you show two objects: red car, automatic gear change, 45 kWh motor AND red car, mechanical gear change, 35kWh motor. Because of the interaction between attributes, these two objects will be "best" object to present to your boss. 3. You can also show, what is the value for each attribute (look for ma video on the willingness-to-trade calculation). Here you can show what should the final price be dependent on the object properties, e.g. red car, automatic gear change, 45kWh for 12,000EUR OR red car, automatic gear change, 35 kWh for 10,000, and so on. As soon as you have price/value, the number of optimal objects to suggest will grow. If something it less optimal - just sell it with a lower price tag. I hope it helps you present your results better. :)
Thank you for the helpful video. Can you show me how to calculate the marginal effects in SPSS?
Actually, SPSS is not good for this. We applied STATA. But you might be interested in this video which explains how to convert odds ratio to probability (th-cam.com/video/UaCB3AWOWtU/w-d-xo.html) or this video which explains how to convert odds ratio to confidence intervals (th-cam.com/video/G5sqDwiwm68/w-d-xo.htmlsi=W5c64U-96KWvChNa). Otherwise, you could run the data after restructuring in STATA (www.peretaberner.eu/how-to-estimate-and-interpret-marginal-effects-from-logit-model-with-stata/). Good luck!
Thank you so much@@eugenleo
As your question was good and indicated demand for marginal effects calculation, I developed a video for this. Enjoy: th-cam.com/video/5YqAgIiHRCM/w-d-xo.html
these are some amazing videos, i am in the last step of research i.e analysing my data and this gives me so much context.
Thank you, pleasure to know it. Feel free to watch my video with the step-by-step analysis (very slow but with comments) and the recent with a plugin that makes analysis easier. I hope it helps.
@@eugenleo yes, i did look at it. My DCE had only 3 attributes with 3 levels each so it was more easy. But your videos are the best for anyone to just understand about DCE in general. Good job there, cheers.
Thank you, Eugen, for creating this excellent video. May I ask, if we create our own experimental design (e.g., orthogonal design), can that be used to inform the design of the choice experiment?
Thank you, Richard. I did not get the question: do you mean, can you use the video to legitimise the method selection, or do you mean "orthogonal design"? If I got your question correctly, I would argue for the depth of information that you receive with a DCE as a good legitimation. An orthogonal design (at least how I understand it) can be tested with multiple between subject randomised experiments. Or you may look for Solomon Experimental Design that combines within and between designs in one. Yet, if it is not about legitimation but about explanation of what you show - this would work perfectly. You can show, for instance, all the attributes, levels, and their interaction. I hope I answered your question.
"promo sm" ❣️
?
Thank you so much ! I am blessed !!
Welcome! Feel free to watch the other videos from the playlist ;)
Now I watched this too, after seeing the data structure:)
Now, you are well equiped for a DCE ;)
Thank you very much. It was really helpful.
Welcome! Don't forget to watch the next video - I made a mistake but corrected it afterwards. ;)
Hello Dear Eugen Bogodistove! I appriciate your work and making Videos on Discrete Choice Experiment! If you have any video on analysis Of DCE through STATA soft ware please help me I did not get videos on it. Thank you!
Hi! Unfortunately, I work very seldom with STATA. I think the biggest issue is the data preparation - you need to refromat the tables. If I were you, I would make all the restructuring in SPSS (if you install the software you get first month free). You save the final file as *.dta for Stata. Analysing data in STATA is not the problem at all afterward - you run the command 'logit final_decision attr1 attr2 (... for scalable attributes, in our example efficiency_gain) attr1lvl1 attr1lvl2 (...for other attributes)'. As in my videos (please watch the video on the fast analysis of a DCE) I code my attributes and levels as dummies, you can treat them as scalable variables. If you recode variables as categoricall/nominal, you use the command "logit final_decision i.attr1 i.attr2 (... for nominal variables)". I hope it helps you further. PS: Theoretically, you can make restructuring even in Excel, but it will be a long and painful process ;)
By the way, in STATA you can calculate marginal means, i.e. % of preference and not only the odds ratios (exp(B)) as in SPSS.
Dear Prof Bogodistov, I use a status quo option in my experiment. What is the effect on the restructuring of the data in SPSS?
Hello. Could you explain, what you mean by "status quo"? Randomized attributes?
@@eugenleo What you called 'none of the proposed options' is called company car in my study, because it was the status quo (if they didn't change their choice in comparison with the original situation).
@@lelavanosselaer8884 you will need to calculate the final_decision variable differently. All other restructuring remains the same. I think...
@@lelavanosselaer8884 it is hard to say without being at my PC and seeing the file. Let's think about it in the following way. If option 1 is preferred it gets a 1 (decision = 1 and index2 = 1) and option 2 gets a 0. If option 2 is preferred, option 1 gets a zero and option 2 gets a one (decision = 2 and Index2 = 2). If "none of the options is selected (decision = 3), then both options get a zero (bone of them is preferred). Then you don't need a 3 in the final_decision. The variable is then binary and you run a logistic regression. I hope it helps. Have a nice evening!
@@lelavanosselaer8884 you can do, or just arrange a meeting with me. I should have time this week. calendly.com/yevgen-bogodistov Yet, I won't be able to look at it before Monday.
How would we go about doing this dce of we want to analyse it using a multinomial logit model by giving variable coefficients instead of 1's everywhere. Eg - -1 for no , 0 for low , 1 for medium etc. Thank you for your response I'm advanced and may God bless you
You add them as scalable (ordinal) covariates in the model (independent variables). The DV remains 'final decision'. Based on the Exp(B) you can say now, in how much an increase in one unit of, e.g. "ambition" increases willingness to retain the person in the team. Did I answer your question or did you ask something different? ;)
Thanks a lot.. Very useful
Welcome. I plan to add some new tricks soon. Good luck with your research!
@@eugenleo would love to read that.. Thanks
I used this video to clean and transform my research output, and it worked. Thank you! (I even figured out a problem I had because three of my attributes had the same names - "low", "medium", and "high". the solution is to add an "and" to the if function and connect attribute name to choice)
Indeed, I had this issue recently too. The check variable helps indicate the issue. Thank you and good luck with your research!
@@eugenleo Do you have a video on this? I use yes and no for different attributes. How do I solve this problem? I do not understand what is meant by 'add an and to the if function'. Thank you in advance!
@@lelavanosselaer8884 Not at the moment. But here is the code that we used: IF (attr1 = "Competitiveness" & attr1fop = "high" | attr2 = "Competitiveness" & attr2fop = "high" | attr3 = "Competitiveness" & attr3fop = "high" | attr4 = "Competitiveness" & attr4fop = "high" | attr5 = "Competitiveness" & attr5fop = "high" | attr6 = "Competitiveness" & attr6fop = "high" | attr7 = "Competitiveness" & attr7fop = "high" | attr8 = "Competitiveness" & attr8fop = "high" | attr9 = "Competitiveness" & attr9fop = "high" | attr10 = "Competitiveness" & attr10fop = "high") Competitiveness_high=1. We had the same anserws for the variables "Competitiveness", "Ambition", etc. These variables had the same values - no, low, medium, and high. So we needed to go through each of them and code accordingly. I hope it helps! I'll try to record a video on this.
@@lelavanosselaer8884 Yes (it is still uploading, but soon you will be able to watch it): th-cam.com/video/L9yKY11A-Tc/w-d-xo.html
@@eugenleo Dear Sir Bogodistov, thank you very much for this video!
Dear Dr. Bogodistov, Hoping you are doing well, Firstly I would like to thank you for your helpful video. I allow myself to text you to ask if this methodology to create surveys for DCE on Qualtrics can be applied to Menu-Based Choice Modeling? Thanks in advance for your time.
To the best of my knowledge, it is not meant for menu-based choice modelling. Of course you can try to program it manually, but I did not find out how to do it. Maybe this will be the new development for the tool.
@@eugenleo Thank you very much. I took the liberty to send you an email regarding this, I hope you don't mind. Thank you again for your time.
@@marcelochafla5190 I'll respond next week.
@@marcelochafla5190 I would aproach the issue like this: th-cam.com/video/gUjr7w2i8lE/w-d-xo.html
Hi thank you for the great video. Mind explaining what apps u are using in this video?
Hi Swalha! I made a bunch on video also with a step-by-step experiment development. You can find more suggestions there. I use Excel, SPSS, and SDT Conjoint tool (github.com/astrezhnev/conjointsdt). Also here: th-cam.com/video/KXSgJpQ0NyA/w-d-xo.html, th-cam.com/video/7lSvr_n76p4/w-d-xo.html
It was a pleasure writing this song for my friend and whole Ukraine. The song comes from the heart and could have been written for all supressed peoples. A free Ukraine is the basis for a free Europe. Thank you Eugen for this very strong video.
Спочатку мурахи по тілу,потім сльози...Слава Украиїні,героям Слава!Смерть ворогам!!!!!
Дякуємо 👍
Thank you for your explanations! Love your explanations and calm voice btw 🙂
May I know how to create decession variable?
I assume tha you mean "decision" variable... You can find it in 13'30'' of the video. In Qualtrics, you indicate your preference. This preference is saved as the answer to the question as 1 (Option 1) or 2 (Option 2). You use these variables as the dependent variable. In the first restructuring you create the variable "decision" were you put the answers from Qualtrics. Yet, after the second restructuring, you have to convert these values into 1 or 0. If the Option 1 was selected, the according option should become 1 and 0 otherwise. I do it in 45'25'' of the video. I hope it helps you with the analysis! Good luck!
Thank you, very helpful.
Welcome! Good luck with your research!
Thank you for the video! Unfortunately I can not add the Javascript option within my qualtrics, is it mandatory to pay for this option?
It seems that Qualtrics requires the full account for JavaScript (www.qualtrics.com/support/survey-platform/managing-your-account/trial-accounts/). Just use the PHP approach, as it works with all types of accounts. Yet, pay attention: if you have a free account, you cannot download the data file. Of course, you can activate a 1-month trial to save the data. It works, but after 1 month you will have to upgrade. Contact your university or a partner university as they usually have institutional accounts, i.e. 50+ licences. They might make you full access to your thesis writing.
@@eugenleo Thank you very much for your kind response, I wanted to stick with the php approach from the beginning, but than had problems to find a free server to upload the files..
@@user-hj3rj3dt4t I use the zzz.com.ua. It is not free, but the first year costs about 4 EUR. They also have the free version but it has issues. Actually, most free hosting platforms have some issues. Investing 4 EUR into research might be a good idea. If you just want to try it out, you can send me the phphfile and I'll upload it to my server. But I can do it once to test, as I have no opportunity to upload files constantly (and you will have to make 4-5 trial&error phases until you DCE looks prefect).
Thank you for your help!
thank you very much for the informing video! what do we do with attributes that stay constant within a DCE, if we only want to vary a few attributes whilst others remain the same?
Hm, I don't know as I never met the situation. Do you mean that the attribute order remains the same while levels vary? Then this is just the regular setting in SDT. If you want that the order to the appearance of attributes varies additional to levels, then you check the respective box in the settings. But if you want that some attributes are shown in a constant order and the others vary, you need to program. Download the php/javascript file, go through the randomisation part of it and rewrite it. My programming knowledge might not be sufficient but it should be a relatively easy procedure.
Very helpful, thank you!
Welcome! I have recently made a short video on use of pictures within a DCE. Enjoy ;)
Brilliant tutorial. Is it possible to share your Qualtrics (.qsf) file as a template? Many thanks
Thank you for your comment. Here is the link to the QSF-file. tango.kl.com.ua/mci/Meetings_BAO_TH-cam.qsf Enjoy!
Dear Dr. Bogodistov I hope you are doing well. I had a question... Is it valid and Reliable to use the SDT Conjoint tool for creating random choice sets (in DCE) for academic research?
Yes, absolutely. The tool has been developed by researchers. You can find the APA-citation in the manual file.
@@eugenleo thank you
Great video, thank you for the insights !
Greetings dear Prof this is very interesting video you have made. I struggle a lot to find such video elicitating how to administer DCE questions with electronic data collection tools. I am PhD student in applied agricultural economics working on DCE and I really want to collect my data with mobile phone or tablets but I have no idea about how to proceed because most the prior studies used paper-and-pen data collect methods and I am not familiar with this. On the other hand I have time constraint going through the paper-based data collect. So I am familiar with the ODK or Kobotoolbox survey design platform. Then I wanted to know 1) if there is speficific platform (e.g. XM as seen from your video) for designing DCE questions, 2) or if the ODK or kobo can also perform the DCE questions. I would like to kindly request your mail address for further questions. Thank you.
Thank you for the comment. 1: yes, there are several tools for DCE development. There is even a manual way to do it. Maybe once I'll make a video for this. Otherwise, simply google for the tools - there are plenty of them. I use Qualtrics as we have an institutional account. And there is a plugin that makes DCE easy to implement. Yet, if you develop the items manually, you may use ANY platform. Once I'll explain how. 2: I've never worked with the platform. But go for it, if it works. My email: yevgen.bogodistov(g)mci.edu
Thanks for your sharing.
Welcome! Let me know if I can be of assistance :)
Is there an option to add 'None of the options'?
Hi! As you are not the first one, who asks this question, I developed a very short video on how to introduce the button "None of the proposed options". th-cam.com/video/IOXjm4cZwAc/w-d-xo.html Good luck and let me know, if I can be of any assistance.
th-cam.com/video/IOXjm4cZwAc/w-d-xo.html Here is a video, where I show how to do it correctly :)
Dear Bogodistov, thank you for the videos. But I have some confusion about some terminologies. Louviere et al. (2010) have article "Discrete choice experiments are not conjoint analysis. But as you mentioned, some of the articles use discrete choice experiments synonyms with discrete choice conjoint. Can you give me some references to understand this situation or can you explain to me? Thanks a lot.
It is a good question, thank you. As far as I understand, DCE is the art of conjoint. The selection options are presented in a different way - instead of ranking the item, you present the in a form of a manipulation - the participant sees only the two (or more) products from which she has to select one. This different way of presentation makes DCE to an experiment which may be seen as a different method. But (to the best of my understanding) the logic behind the method is pretty the same - to find out the preferences of the participant.
@@eugenleo Thank you so much.
interesting... please add tutorial files in the description as well..
I would like to do it, but the data comes from a real study which has not been published yet. Maybe we will add the data after it will have been published.
would really help to have to files
@@wildgameestate425 I plan to upload the files as soon as the project is published. But it might take a while...
@@eugenleo Any chance you could upload the data?
Thank you for sharing this tutorial! Made our second analysis much more easier!