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: LsKa]9BD'XUJr|h54Y~t/qfuy$\]#[Dc=MG'$1dI79f9`~tbtl8WKk'qI

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(12/2020)318. How do managers actually choose suppliers? Evidence from revealed preference data

Autorzy: Manucharyan Hayk
Supplier selection plays a pivotal role in the success of any organization as it significantly reduces purchasing costs and increases corporate competitiveness. At the same time, it is a very challenging task as decision-makers have to tradeoff among…

WP318. How do managers actually choose suppliers? Evidence from revealed preference data

Supplier selection plays a pivotal role in the success of any organization as it significantly reduces purchasing costs and increases corporate competitiveness. At the same time, it is a very challenging task as decision-makers have to tradeoff among different supplier attributes. In this paper, a discrete choice model of supplier selection is developed, based on revealed preference data collected from an electrical equipment manufacturer in Poland. We explore the importance of different attributes for the initial choice and subsequent switching of suppliers. The proposed logit model is proceeded by a nonparametric analysis conducted through the Chi-square Automatic Interaction Detector (CHAID) framework, which serves exploratory purposes. We find that delivery and reliability play a crucial role in decision-making with regards to choosing suppliers and switching them if necessary.


Manucharyan Hayk
supplier selection purchasing supply chain management revealed preferences discrete choice analysis logit model CHAID prediction model

WP(31/2015)179. Addressing empirical challenges related to the incentive compatibility of stated preference methods

Autorzy: Czajkowski Mikołaj, Vossler Christian A., Budziński Wiktor, Wiśniewska Aleksandra, Zawojska Ewa
An emerging theoretical literature focused on the incentive compatibility of stated preference surveys offers a new lens through which to view extant evidence on external validity, and provides guidance for practitioners. However, critical theoretica…

WP179. Addressing empirical challenges related to the incentive compatibility of stated preference methods

An emerging theoretical literature focused on the incentive compatibility of stated preference surveys offers a new lens through which to view extant evidence on external validity, and provides guidance for practitioners. However, critical theoretical assumptions rest on latent respondent beliefs, such as the belief that respondents view surveys as potentially influencing policy (i.e., policy consequentiality), which gives rise to pressing empirical challenges. In this study, we develop a Hybrid Mixed Logit model capable of integrating multiple latent beliefs, and subjective measures of these beliefs, into discrete choice models of stated preferences. Further, we provide a split-sample test of the effects of exogenous information signals related to policy consequentiality. Our results suggest some potential for researchers to induce desired beliefs through simple information signals and, importantly, that latent beliefs and information signals significantly influence elicited willingness to pay.


Czajkowski Mikołaj, Vossler Christian A., Budziński Wiktor, Wiśniewska Aleksandra, Zawojska Ewa
discrete choice experiment stated preferences consequentiality field experiment hybrid mixed logit model

WP(29/2013)114. Switching Costs and Network Effects - How Much Do they Really Matter in Mobile Telecommunications?

Autorzy: Czajkowski Mikołaj, Sobolewski Maciej
Our study focuses on the identification and the measurement of switching costs and network effects in mobile telecommunications. Although these two phenomena create similar consumer lock-in mechanisms, there are no empirical studies that integrate th…

WP114. Switching Costs and Network Effects - How Much Do they Really Matter in Mobile Telecommunications?

Our study focuses on the identification and the measurement of switching costs and network effects in mobile telecommunications. Although these two phenomena create similar consumer lock-in mechanisms, there are no empirical studies that integrate them into one model of subscriber's behavior. Our study fills this gap by applying stated preference valuation methods to a representative sample of individual mobile phone users in Poland. We find that number portability can be attributed to only approximately 50% of the total switching costs associated with changing either the provider or the service and the remaining part is associated with status quo inertia. Additionally, we show that because network effects play an important role in service valuation, they lead to strengthening the lock-in mechanisms even further. Our study provides the first empirical measurements of the relative importance of these simultaneous effects and provides the estimates of their monetary value.


Czajkowski Mikołaj, Sobolewski Maciej
Switching costs network effects mobile telecommunications mobile number portability brand valuation stated preference non-market valuation discrete choice experiment random parameters multinomial logit model

WP(5/2013)90. Providing Preference-Based Support for Forest Ecosystem Service Management in Poland

Autorzy: Czajkowski Mikołaj, Bartczak Anna, Giergiczny Marek, Stale Navrud, Żylicz Tomasz
The paper looks at people's preferences for the changes in selected ecosystem services resulting from new management strategies of forest areas in Poland. It applies a generalized multinomial logit (G-MNL) model to interpret the results of a disc…

WP90. Providing Preference-Based Support for Forest Ecosystem Service Management in Poland

The paper looks at people's preferences for the changes in selected ecosystem services resulting from new management strategies of forest areas in Poland. It applies a generalized multinomial logit (G-MNL) model to interpret the results of a discrete choice experiment (DCE) study administered to a representative sample of 1001 Poles. The questionnaire included three physical attributes, namely: protecting the most ecologically valuable forest ecosystems, reducing litter in forests, and improving recreation infrastructure. The selection of these attributes was motivated by extensive qualitative research of what indicators of biodiversity, nature protection and recreation possibilities people are the most sensitive to. The fourth attribute was monetary - additional cost of the new programs which would have to be financed out of increased taxes. The results allowed for a robust estimation of implicit prices of the choice attributes and calculating welfare measures of specific forest management scenarios. In addition, the study revealed interesting connections between respondents' current forest recreation patterns and the importance they place on different attributes of forests. The results make it possible to utilize respondents' preference heterogeneity, to a large extent determined by their current recreational use patterns, in designing future forest management strategies.


Czajkowski Mikołaj, Bartczak Anna, Giergiczny Marek, Stale Navrud, Żylicz Tomasz
Biodiversity forest recreation discrete choice modeling generalized multinomial logit model
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