Working Papers

Seria wydawnicza WNE WORKING PAPERS prowadzona jest przez WNE UW od 2008 r. i jak dotąd opublikowano w niej ponad 400 prac.

Seria WNE Working Papers służy szybkiemu upowszechnianiu wyników badań prowadzonych na Wydziale Nauk Ekonomicznych UW. Publikowane tu teksty mają charakter wersji roboczych (pre-printów): mogą być uzupełniane lub poprawiane w miarę postępu prac nad tekstem i procesu wydawniczego. Prezentujemy aktualną wersję udostępnioną przez autorów, opatrzoną datą oraz identyfikatorami DOI/ISSN – co ułatwia jej cytowanie i śledzenie kolejnych iteracji. Każdy dokument zachowuje pełne prawa autorskie swoich twórców, a w przypadku późniejszych zmian, autorzy mogą w dowolnym momencie zamieścić zaktualizowany plik lub wskazać miejsce ostatecznego wydania.

Do serii WORKING PAPERS przyjmowane są artykuły pracowników naukowych WNE UW oraz publikacje z konferencji organizowanych na WNE UW. Artykuły powinny dotyczyć ekonomii, mieć charakter oryginalnych prac badawczych, nie być wcześniej publikowane. Przyjmowane są wyłącznie teksty w języku angielskim.

Prace prosimy przesyłać e-mailem na adres: M}6`=PuCYv#V4A5O2^E&easxm%9]#[Em&L~?]07gkI'X-=rg7{nGXnvr$

Prosimy przesyłać dwa pliki:

(1) główny tekst bez podania tytułu artykułu oraz autorów (plik DOC/DOCX) oraz

(2) stronę tytułową zawierającą: tytuł opracowania, autorów oraz ich afiliację (plik DOC/DOCX). 

Przed przesłaniem tekstu prosimy zapoznać się z szczegółowymi wymogami edycyjnymi.

Redaktorem wydawniczym serii Working Papers jest dr Maciej Bukowski.

Ilość wyników 4

WP(4/2022)380. Incentivizing stated preference elicitation with choice-matching in the field

Autorzy: Zawojska Ewa, Krawczyk Michał
Stated preferences should ideally be elicited in ways providing respondents with economic incentives to report them truthfully—that is, in incentive-compatible conditions. This study aims at testing empirically a novel theoretical approach, whi…

WP380. Incentivizing stated preference elicitation with choice-matching in the field

Stated preferences should ideally be elicited in ways providing respondents with economic incentives to report them truthfully—that is, in incentive-compatible conditions. This study aims at testing empirically a novel theoretical approach, which allows for incentive-compatible elicitation of preferences. Choice-matching, proposed by Cvitanić et al. (2019), is applied here to elicit stated preferences towards a public good. While the approach has been originally designed for incentivizing responses to a multiple choice question, we illustrate its possible application to an open-ended question. We conduct an online experiment mirroring a standard stated preference survey as used for valuation of public goods. Two versions of the survey questionnaire are implemented: one employing the incentive-compatible choice-matching approach and another representing a common non-incentivized setting. We find that the open-ended willingness-to-pay values are statistically significantly higher when stated under choice-matching than when expressed in the non-incentivized conditions.


Zawojska Ewa, Krawczyk Michał
contingent valuation choice-matching incentive compatibility open-ended elicitation stated preferences

WP(35/2015)183. Does the number of discrete choice alternatives matter for respondents’ stated preferences? The case of tap water quality improvements

Autorzy: Czajkowski Mikołaj, Giergiczny Marek, Zawojska Ewa
Contingent valuation is among the most widely used techniques for studying consumers’ preferences. Nevertheless, whether respondents reveal their true preferences in contingent valuation surveys is still the subject of academic debate. The exis…

WP183. Does the number of discrete choice alternatives matter for respondents’ stated preferences? The case of tap water quality improvements

Contingent valuation is among the most widely used techniques for studying consumers’ preferences. Nevertheless, whether respondents reveal their true preferences in contingent valuation surveys is still the subject of academic debate. The existing literature indicates that the truthful disclosure of preferences pivots on the number of alternatives presented in a single choice task. On a theoretical basis, the use of a two-alternative task format has long been recommended because of its incentive-compatible properties, which ensure that respondents’ disclosure of their true preferences constitutes their optimal strategy. However, the empirical literature presents nascent evidence that providing more than two choice alternatives may increase the respondents’ likelihood of finding an option that satisfactorily matches their preferences; consequently, a multiple-alternative task format likely enhances the accuracy of preference disclosures. Furthermore, empirical studies often employ multiple alternatives for a single task because of statistical efficiency gains. The lack of consensus about the impact of the number of alternatives on respondents’ truthfulness when stating their preferences in contingent valuation surveys motivates this study. Using data from a discrete choice experiment, we examine whether willingness-to-pay (WTP) estimates depend on the number of alternatives provided for a single choice task. We employ a split-sample design that uses two- and three-alternative formats in a contingent valuation survey of proposed public policies for the improvement of tap water quality (iron and chorine content, hardness) in Milanówek, a town in the Warsaw agglomeration in Poland. Drawing on a generalized mixed logit model with scale heterogeneity, we find no significant differences in the mean WTP values elicited with two- and three-alternative tasks, while the WTP estimates based on three-alternative tasks appear to have relatively lower standard errors compared with two-alternative tasks. This finding indicates that using three or more alternatives per choice task may offer a way to increase efficiency without biasing the results.


Czajkowski Mikołaj, Giergiczny Marek, Zawojska Ewa
stated preference methods contingent valuation discrete choice experiment incentive compatibility number of alternatives field study tap water quality

WP(12/2015)160. The Individual Travel Cost Method with Consumer-Specific Values of Travel Time Savings

Autorzy: Czajkowski Mikołaj, Giergiczny Marek, Kronenberg Jakub, Englin Jeffrey
The treatment of the opportunity cost of travel time in travel cost models has been an area of research interest for many decades. This analysis develops a methodology to combine the travel distance and travel time data with respondent-specific estim…

WP160. The Individual Travel Cost Method with Consumer-Specific Values of Travel Time Savings

The treatment of the opportunity cost of travel time in travel cost models has been an area of research interest for many decades. This analysis develops a methodology to combine the travel distance and travel time data with respondent-specific estimates of the value of travel time savings. The individual travel time values are elicited with the use of discrete choice stated preference methods. The travel time valuation procedure is integrated into the valuation exercise to create a two equation structural model of site valuation. Since the travel time equation of the structural model incorporates individual preference heterogeneity full structural model provides a travel cost site demand model based upon individualized values of time. The methodology is illustrated in a study of recreational birdwatching, more specifically, visits to a stork village in Poland. We show that the usual practice of basing respondents’ value of travel time savings on their wage rate is largely unfounded.


Czajkowski Mikołaj, Giergiczny Marek, Kronenberg Jakub, Englin Jeffrey
contingent valuation stated preference validity incentive compatibility

WP(8/2015)156. Re-examining empirical evidence on contingent valuation - Importance of incentive compatibility

Autorzy: Zawojska Ewa, Czajkowski Mikołaj
The contingent valuation (CV) method uses respondents’ stated choices made in hypothetical situations to infer their preferences for environmental public goods. It enables the general public’s preferences to be stated in monetary terms an…

WP156. Re-examining empirical evidence on contingent valuation - Importance of incentive compatibility

The contingent valuation (CV) method uses respondents’ stated choices made in hypothetical situations to infer their preferences for environmental public goods. It enables the general public’s preferences to be stated in monetary terms and hence to estimate the economic value of a change in the quantity or quality of the goods. However, a key question remains regarding CV’s validity: do the value estimates obtained from a CV study reflect respondents’ true preferences and their maximum willingness to pay? Numerous empirical investigations have tested CV’s validity, but overall conclusions are mixed. We critically re-evaluate this evidence considering the issue of incentive compatibility in contingent valuation settings for which the necessary conditions were recently proposed by Carson and Groves (2007). Our analysis shows that once incentive compatibility conditions are considered, the available studies consistently show that the CV method is valid. As a result, we argue that contingent scenarios and elicitation formats must be made incentive compatible in order to observe consumers’ true preferences.


Zawojska Ewa, Czajkowski Mikołaj
contingent valuation stated preference validity incentive compatibility
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