2018

18-01.  Yuhta Ishii, Aniko Ory and Adrien Vigier, Competing for Talent.

Resumen: In many labor markets, e.g., for lawyers, consultants, MBA students, and professional sport players, workers get oered and sign long-term contracts even though waiting could reveal signicant information about their capabilities. This phenomenon is called unraveling. We examine the link between wage bargaining and unraveling. Two rms, an incumbent and an entrant, compete to hire a worker of unknown talent. Informational frictions prevent the incumbent from always observing the entrant's arrival, inducing unraveling in all equilibria. We analyze the extent of unraveling, surplus shares, the average talent of employed workers, and the distribution of wages within and across rms.


18-02. Bertan Turhan, Welfare and Incentives in Partitioned School Choice

Resumen: Divided enrollment systems cause school assignments to be unfair and wasteful. Iterative version of the student-optimal stable mechanism (I-SOSM), proposed by Manjunathand Turhan (2016), achieves individually rational and fair assignments in such partitioned school choice markets for any number of iteration. It also reaches a nonwasteful matching when iterated sufficiently many times. This paper examines the effects of partition structure of schools on students’ welfare and incentives they face under I-SOSM. I find that when school partition gets coarser students’ welfare weakly increases under I-SOSM for any number of iteration. I also show that under coarser school partitions I-SOSM becomes weakly less manipulable for students according to a criteria defined by Pathak and Sönmez (2013). These results suggest that when full integration is not possible keeping school partition as coarse as possible benefits students with respect to their welfare and incentives they face if stability is a concern for policymakers.


18-03. Mustafa O˘guz Afacany, Inácio Bóz and Bertan Turhan, Assignment Maximization

Resumen: We evaluate the goal of maximizing the number of individually rational assignments. We show that it implies incentive, fairness, and implementation impossibilities. Despite that, we present two classes of mechanisms that maximize assignments. The first are Pareto efficient, and undominated – in terms of number of assignments – in equilibrium. The second are fair for unassigned students and assign weakly more students than stable mechanisms in equilibrium. We provide comparisons with well-known mechanisms through computer simulations. Those show that the difference in number of matched agents between the proposed mechanisms and others in the literature is large and significant.


18.04 Igor L. Kheifets, Multivariate Specification Tests Based on a Dynamic Rosenblatt Transform

Resumen: This paper considers parametric model adequacy tests for nonlinear multivariate dynamic models. It is shown that commonly used Kolmogorov-type tests do not take into account cross-sectional nor time-dependence structure, and a test, based on multi-parameter empirical processes, is proposed that overcomes these problems. The tests are applied to a nonlinear LSTAR-type model of joint movements of UK output growth and interest rate spreads. A simulation experiment illustrates the properties of the tests in finite samples. Asymptotic properties of the test statistics under the null of correct specification and under the local alternative, and justification of a parametric bootstrap to obtain critical values, are provided.