The structure of the set of sunspot equilibria in economies with incomplete financial markets

Summary This paper considers the set of equilibria of two-period, sunspot economies withS purely extrinsic states of nature in the second period andI assets with linearly independent nominal payoffs. The span of the payoff matrix contains the vector [1, ... , 1] (i.e., inside money). The set of economies is described in terms of (sunspot-invariant) utility functions. IfS>I> 0, there is an open, dense set of economies such that, given a vector of no arbitrage asset prices, the set of equilibrium allocations contains a smooth manifold of dimensionS—I. Such a manifold contains at least one nonsunspot equilibrium (and at most a finite number of such equilibria).The paper was written while I was a visitor at C.O.R.E., Universitè Catholique de Louvain, with the financial support of a S.P.E.S. fellowship. I would like to thank D. Cass, H. Polemarchakis and P. Siconolfi for their helpful comments.     

The effects of employment protection: Learning from variable enforcement

Employment protection legislation (EPL) is not enforced uniformly across the board. There are a number of exemptions to the coverage of these provisions: firms below a given threshold scale and workers with temporary contracts are not subject to the most restrictive provisions. This within-country variation in enforcement allows us to make inferences on the impact of EPL which go beyond the usual cross-country approach. In this paper we develop a simple model which explains why these exemptions are in place to start with. Then we empirically assess the effects of EPL on dismissal probabilities and on the equilibrium size distribution of firms. Our results are in line with the predictions of the theoretical model. Workers under permanent contracts in firms with less restrictive EPL are more likely to be dismissed. However, there is no effect of the exemption threshold on the growth of firms.     

Setting the minimum wage

The process leading to the setting of the minimum wage so far has been overlooked by economists. There are two common ways of setting national minimum wages: they are either government legislated or the byproduct of collective bargaining agreements, which are extended erga omnes to all workers. We develop a simple model relating the level of the minimum wage to the setting regime. Next, we exploit a new data set on minimum wages in 68 countries having a statutory national minimum level of pay in the period 1981–2005. We find that a Government legislated minimum wage is lower than a wage floor set within collective agreements. This effect survives to several robustness checks and can be interpreted as a causal effect of the setting regime on the level of the minimum wage.     

Internal And External Adjustment To New Technologies

Schumpeterian creative destruction occurs not only at the industry level, but also with each firm trying to maintain or improve its position in the technology race. Based on a rich data set on more than 4,000 German business units, this paper shows that the simultaneous occurrence of hiring and separations is more likely in firms with the most advanced technologies in use than in units more distant from the technological frontier. This positive relation between technological advance and creative destruction documented also by churning and ‘excess job reallocation equations - holds particularly in recovery years, while it is weak during a recession. The explanation provided for this finding in the paper is that firms can also improve technologies by upgrading machinery and/or retraining workers, and these ‘implementation’ costs arc likely to be lower during economic downturns.     

Beyond Eurosclerosis

Europe no longer suffers from Eurosclerosis; unemployment, notably long-term unemployment, had decreased substantially for more than a decade. Mobility across labour market states increased in those countries where unemployment has been falling the most. Institutional reforms -- such as declining employment protection for new entrants in the labour market and less generous unemployment benefits -- account for this increase in mobility. Focusing on these reforms, we rationalize why EU workers, including those with permanent contracts, are increasingly unhappy about labour market conditions in spite of the disappearance of mass unemployment in Europe. Due to these perceptions, policy reversals cannot be ruled out. Governments wishing to minimize the risk of going back to Eurosclerosis should move towards flexicurity configurations, compensating workers for higher risks of job loss, and introduce tenure tracks to the labour market, preventing the development of dual labour market structures. This would avoid dissipating the employment gains of the last decade during this recession.
--- Tito Boeri and Pietro Garibaldi     

Seasonal and Day-of-the-Week Effects in Four Emerging Stock Markets

The “January effect” and the “weekend effect” have proven to be persistent anomalies in U.S. equity markets. The objective of this paper is to examine seasonal and daily patterns in equity returns of four emerging markets: Hong Kong, Singapore, Malaysia, and the Philippines. These markets are gaining importance with the globalization of business; therefore, it is necessary to examine the efficiency and functioning of these capital markets. Our analysis uses daily data for the 12 years from September 1, 1976, to June 30, 1988. The results support the existence of a seasonal pattern in these markets. Returns in the month of January are higher than any other month for all markets examined except the Philippines. A robust day-of-the-week effect is also found. These markets exhibit a weekend effect of their own in the form of low Monday returns. In addition, there exists a strong “Tuesday effect,” which may be related to the + 13 hour time difference between New York and these emerging markets.     

Some consequences of banks' LDC loans: A note

The realized returns on LDC loans made prior to 1980 and hypothetically sold at (below par) secondary market prices in either 1986, when a secondary market first began, or, say, in 1989 are moderately positive. The realized risk-adjusted returns to investors on a portfolio of large LDC lending bank stocks are unmistakenly lower than the return on a broad market index, though they are not significantly so. Similarly, although the difference is not statistically significant, the average realized return on LDC lending banks' stocks is well below that of a portfolio of non-LDC lending banks. The article concludes that while shareholders suffered economic losses as a result of LDC lending activity, these losses were not quantitatively large.     

Welfare and excess volatility of exchange rates

We study the properties of a GEI model with nominal assets, outside money (injected into the economy as in Magill and Quinzii (J Math Econ 21:301–342, 1992)), and multiple currencies. We analyze the existence of monetary equilibria and the structure of the equilibrium set under two different assumptions on the determination of the exchange rates. If currencies are perfect substitutes, equilibrium allocations are indeterminate and, generically, sunspot equilibria exist. Generically, given a nonsunspot equilibrium, there are Pareto improving (and Pareto worsening) sunspot equilibria associated with an increase in the volatility of the future exchange rates. We interpret this property as showing that, in general, there is no clear-cut effect on welfare of the excess volatility of exchange rates, even when due to purely extrinsic phenomena.