This paper argues that the textbook search and matching model cannot generate the observed business-cycle-frequency fluctuations in unemployment and job vacancies in response to shocks of a plausible magnitude. In the United States, the standard deviation of the vacancy-unemployment ratio is almost 20 times as large as the standard deviation of average labor productivity, while the search model...

Fixed-term contract employment has increasingly replaced regular open-ended employment as the predominant form of employment notably in developing countries. Guided by factory-level evidence showing nuanced patterns of co-movements of regular and contract wages, we propose a two-tiered task based model with self-enforcing contracts in which firms allocate complex tasks to long term employees at...

Flexibility vs. Rigidity: Does Spain have the worst of both Worlds? In this paper we study the structure of labor market flows in Spain and compare them with France and the US. We characterize a number of empirical regularities and stylized facts. One striking result is that the job finding rate is slightly higher than in France, while the jon loss rate is much higher, putting Spain half-way be...

We consider a market where there is an agency relationship between the providers of a service or agents and their clients. Agents can choose to work alone or to have a sharing agreement with other agents. Sharing agreements create value by facilitating better matches between clients and agents, but they worsen incentives because of free riding. We show that in the context of a one shot game, th...

When contracting is not possible, a preference for fair exchange can generate efficient exchange, fully exhausting the potential gains from trade — or no exchange at all, leaving all gains from trade unexploited. A profit-maximizing firm offers a wage to a fair-minded worker, who then chooses how much effort to exert. The Rotten Firm theorem says: if the worker cares sufficiently about fairness...

Gibbons (1998) identifies a tradeoff between up-or-stay and up-or-out promotion rules. Upor-stay never wastes skills of those not promoted but may provide insufficient incentives to invest in skills. Up-or-out on the other hand can always induce investment in skill acquisition but may waste the skills of those not promoted. This paper reports about an experiment designed to study this tradeoff....

Economists and sociologists disagree over markets’ potential to assume functions typically performed by networks of personal connections, first among them the transmission of information. This paper begins from a model of labor markets where social ties are stronger between similar individuals and firms employing productive workers prefer to rely on personal referrals than to hire on the anonym...

More on Unemployment and Vacancy Fluctuations Shimer (2005a) argues that the Mortensen-Pissarides equilibrium search model of unemployment grossly under predicts the size of the response in the job finding rate to a productivity shock. Some of the recent papers inspired by his critique are reviewed and commented on here. Specifically, I suggest that the problem is not procyclicality of the wage...

This paper argues that the textbook search and matching model cannot generate the observed business-cycle-frequency fluctuations in unemployment and job vacancies in response to shocks of a plausible magnitude. In the United States, the standard deviation of the vacancy-unemployment ratio is almost 20 times as large as the standard deviation of average labor productivity, while the search model...

Job Durations with Worker and Firm Specific Effects: MCMC Estimation with Longitudinal Employer-Employee Data We study job durations using a multivariate hazard model allowing for worker-specific and firm-specific unobserved determinants. The latter are captured by unobserved heterogeneity terms or random effects, one at the firm level and another at the worker level. This enables us to decompo...