On Environmental Policy and Permitting

The literature on environmental policy under adverse selection usually assumes that firms' profit vary monotonically with a private information parameter. However, it is easy to demonstrate using standard production setups that regularity is not the rule. We show that policy requirements are very sensitive to this assumption. In particular, the optimal instrument resembles more an “adaptable” pollution standard than the economic instrument of an environmental tax. We also show that permitting, which results in some firms overinvesting in pollution‐control equipment, does not serve the objective of improving the environment but rather allows the agency to increase the proceeds of the policy.     

Consensus,Dispersion and Security prices*

Abstract. This study establishes and tests, within the framework of a noisy rational expectations equilibrium model, the existence of a formal linear relationship between security prices, the average (consensus) and the dispersion of agents' expectations. Variations in the average and in the dispersion of agents' expectations, measured by the earnings forecasts produced by financial analysts, which are gathered and made available by The Institutional Brokers Estimate System (I/B/E/S), have respectively a positive and negative effect on security prices. The difficulties raised by this estimation, as well as the institutional dimensions of the financial analysis industry are examined. The main results are the following: (1) the most important changes in consensus (in absolute value) correspond to the most important changes in dispersion in the analysts' forecasts, (2) the changes in the consensus and the dispersion of forecasts are respectively positively and negatively linked to Canadian security returns, but given the delay between the production and the public availability of the forecasts, an important part of the price adjustment occurs before the disclosure of forecast changes, (3) the effect on security returns of variations in the consensus dominates the effect of variations in the forecasts' dispersion. Thus, it seems that the impact of information arrival on security prices does not only depend on the direction and the magnitude of the expectations' average revision, but also depends on the direction and the magnitude of the change in the expectations' dispersion.     

Consensus,dispersion et prix des titres*

Résumé. Cette étude établit et teste, dans un cadre d'équilibre d'anticipations rationnelles bruité, l'existence d'une relation linéaire formelle entre le prix des titres, la moyenne (le consensus) et la dispersion des anticipations des agents. Les variations de la moyenne et de la dispersion des anticipations des agents, mesurées par les prévisions de bénéfices réalisées par les analystes financiers transmises par I/B/E/S, ont respectivement un effet positif et négatif sur le prix des titres. Les difficultés soulevées par cette estimation, ainsi que les dimensions institutionnelles de l'industrie de l'analyse financière sont examinées. Les principaux résultats sont les suivants: 1) les variations les plus importantes du consensus (en valeur absolue) correspondent aux variations les plus importantes (en valeur absolue) de la dispersion des prévisions d'analystes, 2) les changements dans le consensus et la dispersion des prévisions sont respectivement liés positivement et négativement aux rendements des actions canadiennes mais en raison du décalage entre la réalisation et la diffusion des prévisions, une part importante de l'ajustement de prix a lieu avant la diffusion publique des changements dans les prévisions, 3) l'effet des variations du consensus sur le rendement des titres domine l'effet des variations de la dispersion des prévisions. Il semble donc que l'impact de l'arrivée d'information sur le prix des titres ne dépende pas uniquement du sens et de l'ampleur de la révision moyenne des anticipations, mais aussi du sens et de l'ampleur du changement dans la dispersion des anticipations.     

Assessing the Equalizing Force of Mobility Using Short Panels: France, 1990–2000

In this paper, we document whether and how much the equalizing force of earnings mobility has changed in France in the 1990's. For this purpose, we use a representative three-year panel, the French Labour Force Survey. We develop a model of earnings dynamics that combines a flexible specification of marginal earnings distributions (to fit the large cross-sectional dimension of the data) with a tight parametric representation of the dynamics (adapted to the short time-series dimension). Log earnings are modelled as the sum of a deterministic component, an individual fixed effect and a transitory component which is assumed first-order Markov. The transition probability of the transitory component is modelled as a one-parameter Plackett copula. We estimate this model using a sequential expectation-maximization algorithm.
We exploit the estimated model to study employment/earnings inequality in France over the 1990–2002 period. We show that, in phase with business-cycle fluctuations (a recession in 1993 and two peaks in 1990 and 2000), earnings mobility decreases when cross-section inequality and unemployment risk increase. We simulate individual earnings trajectories and compute present values of lifetime earnings for various horizons. Inequality presents a hump-shaped evolution over the period, with a 9% increase between 1990 and 1995 and a decrease afterwards. Accounting for unemployment yields an increase of 11%. Moreover, this increase is persistent, as it translates into a 12% increase in the variance of log present values. The ratio of inequality in present values to inequality in one-year earnings, a natural measure of immobility or of the persistence of inequality, remains remarkably constant over the business cycle.     

Twenty Years of Rising Inequality in U.S. Lifetime Labour Income Values

In this paper we study the evolution of lifetime labour income inequality by constructing present value life cycle measures that incorporate both earnings and employment risk. We find that, even though lifetime income inequality is 40% less than earnings inequality, the total increase in lifetime income inequality over the past 20 years is the same as earnings inequality. While the total increase is the same, the pathways there differ with earnings inequality experiencing a steady increase and lifetime income inequality increasing in spurts particularly in the latter half of the 1990s. Finally, we find the changes in lifetime income inequality are primarily driven by changes in earnings mobility and changes in the earnings distribution itself, changes in employment risk and the composition of the sample, such as the shift toward attaining more education and the ageing population, do not play a large role.