The effects of a minimum wage increase in a model with multiple unemployment equilibria

We introduce the heterogeneity of labor in a simple imperfectly com- petitive aggregate labor market model "à la Manning (1990)" in order to analyze the effects of an exogenous rise of the legal minimum wage on the unemployment equilibrium, the wage dispersion and the general price level. We assume also the presence of "knowledge spillovers" in the in- dividual production function leading to increasing returns to scale at the aggregate level and involving the possibility of multiple equilibria. Then, thanks to a comparative statics exercise, we show that a rise in the legal minimum wage has no impact on the unemployment equilibria, increases the general price level proportionally to the share of low-skilled employ- ment in the total employment and reduces the wage dispersion. These results are broadly consistent with the Card Krueger's empirical findings (1995).

Gender Bias in Job Referrals: An Experimental Test

Employee referral programs, while efficient for the employer, have been shown to amplify sex-based occupational segregation in the labour markets. We present evidence from a laboratory experiment designed to shed light on same-gender bias in job referrals within gender-balanced networks. Our data suggest that women tend to favor women in their referral choice, whereas men do not attach much importance to the gender of potential candidates. Our experimental design allows us to disentangle between statistical discrimination, preferences, and pure same-gender bias. Our findings add to the existing literature by highlighting that gendered networks alone do not explain the observed gender homophily in referred-referrer pairs

Gender Bias in Job Referrals: An Experimental Test

Employee referral programs, while efficient for the employer, have been shown to amplify sex-based occupational segregation in the labour markets. We present evidence from a laboratory experiment designed to shed light on same-gender bias in job referrals within gender-balanced networks. Our data suggest that women tend to favor women in their referral choice, whereas men do not attach much importance to the gender of potential candidates. Our experimental design allows us to disentangle between statistical discrimination, preferences, and pure same-gender bias. Our findings add to the existing literature by highlighting that gendered networks alone do not explain the observed gender homophily in referred-referrer pairs

Unemployment and Economic Policy in a Multiple Equilibria Framework.

Cette thèse étudie les performances du marché du travail dans une économie susceptible de présenter plusieurs équilibres, et les implications d’une telle configuration pour la politique économique. Elle comporte quatre essais, traitant chacun d’un aspect spécifique de cette problématique. En premier lieu, l’analyse économétrique des séries temporelles de taux de chômage de quelques pays de l’OCDE, permettant notamment l’identification des changements de régimes et de leurs caractéristiques, apporte des évidences significatives à l’appui de l’hypothèse d’une multiplicité d’équilibres. En second lieu, on étudie les effets de l’introduction d’un salaire minimum obligatoire et d’une hausse de celui-ci dans un modèle statique de concurrence imparfaite avec négociations salariales au niveau de la firme, le facteur travail étant hétérogène. Si la hausse du salaire minimum est défavorable à l’emploi,l’introduction d’un salaire minimum en présence d’une multiplicité d’équilibres permet d’éliminer l’équilibre Pareto-inférieur. En troisième lieu, on étudie également les implications de l’existence d’équilibres multiples pour les politiques économiques, du fait de l’altération des propriétés dynamiques de l’économie, à travers l’analyse complète d’un modèle dynamique de concurrence imparfaite avec des négociations salariales individuelles et des frictions d’appariement sur le marché du travail. Enfin, on montre grâce à l’outil expérimental dans quelle mesure l’introduction d’une variable dite de tâche solaire, peut être source de défaut de coordination et d’inefficience dans une économie possédant deux équilibres Pareto-ordonnés.This thesis analyzes the performances of labor market in an economy subject to multiple equilibria and the implications of such a configuration for economic policy. It contains four pieces of research, each dealing with a particular aspect of the general setting. First, the econometric analysis of the unemployment time series for several OECD countries,which allows the identification of regime switches and their characteristics, brings forth some significant evidence that the multiple equilibria framework is relevant. Second, the effect of the implementation and of the rise of the minimum wage are investigated through a static model, assuming imperfect competition, heterogeneous labor input and wage negotiations at the firm level. Though minimum wage hikes have an adverse effect on employment, the implementation of a binding minimum wage turns out to be an efficient tool for excluding the Pareto- inferior equilibrium. Third economic policy conditions are also affected because the existence of multiple equilibria alters the dynamic properties of the economy. This case has been investigated in the framework of a fully dynamic model assuming imperfect competition individual wage negotiations and matching frictions. Finally, a coordination game experiment confirms that the introduction of a sunspot can be a source of coordination failure and inefficiency in an economy with two Pareto-ranked equilibria

Un modèle d'équilibre multiple avec marchandage intra-firmes et frictions d'appariement

International audienceIn this paper, we combine a matching model derived from Pissarides (2000) in the case of large firms with monopolistic competition on the product market and the model of intrafirm bargaining à la Stole and Zwiebel (1996). Moreover, we allow for increasing returns to scale in the aggregate production function leading to multiple equilibria. Then, we study the dynamics of such a framework for various size of returns to scale and propose numerical simulations. Finally, we show how the dynamical properties are altered in the case of multiple equilibria compared to that of a unique equilibrium and illustrate the issues of economic policy design in presence of multiple equilibria

Multiple equilibria model with intrafirm bargaining and matching frictions

In this paper, we combine a matching model derived from Pissarides (2000) in the case of large firms with monopolistic competition on the product market and the model of intrafirm bargaining à la Stole and Zwiebel (1996). Moreover, we allow for increasing returns to scale in the aggregate production function leading to multiple equilibria. We study the dynamics of such a framework and propose numerical simulations. We show that labour market regulation can make unlikely the occurrence of the Pareto inferior equilibrium and that product market deregulation can have an effect on employment contrary to the expected result when the economy stands at this equilibrium. We give also some policy recommendations to reach the Pareto superior equilibrium when multiple equilibria exist.Matching frictions Monopolistic competition Intrafirm bargaining Multiple equilibria Economic policy

A Multiple Equilibria Model with Intrafirm Bargaining and Matching Frictions

In this paper, we combine a matching model derived from Pissarides (2000) in the case of large .rms with monopolistic competition on the product market and the model of intra.rm bargaining à la Stole and Zwiebel (1996). Moreover, we allow for increasing returns to scale in the aggregate production function leading to multiple equilibria. Then, we study the dynamics of such a framework for various size of returns to scale and propose numerical simulations. Finally, we show how the dynamical properties are altered in the case of multiple equilibria compared to that of a unique equilibrium and illustrate the issues of economic policy design in presence of multiple equilibria.