Disability Risk Management and Postinjury Employment of Workers With Back Pain

We analyze the outcomes of occupational back pain among four large employers that use one or more of the following disability management practices: aggressive return to work, claims management, medical management, or time‐limited job accommodations. Outcomes measured at 6 and 12 months postonset include: duration of initial work absence and the probability of returning to stable employment. Employment outcomes are better in firms with more proactive return‐to‐work policies than in firms with more restrictive policies. We devise a statistical test for attrition bias and conclude that sample attrition does not significantly alter our results.     

Inference on vertical contracts between manufacturers and retailers allowing for nonlinear pricing and resale price maintenance

We present a model of vertical contracts between manufacturers and retailers with nonlinear pricing strategies. Using home‐scan data on bottled water produced by manufacturers and sold by retail chains in France, we estimate a structural demand and supply model allowing for two‐part tariff contracts between manufacturers and retailers. Using price‐cost margins recovered from estimates of demand parameters, we select the best supply model by performing nonnested tests, and find that manufacturers use two‐part tariff contracts with resale price maintenance. We then perform counterfactual policy simulations that restrict the use of these vertical contracts and assess welfare effects under alternative scenarios.     

Explaining asset pricing puzzles associated with the 1987 market crash

The 1987 market crash was associated with a dramatic and permanent steepening of the implied volatility curve for equity index options, despite minimal changes in aggregate consumption. We explain these events within a general equilibrium framework in which expected endowment growth and economic uncertainty are subject to rare jumps. The arrival of a jump triggers the updating of agents' beliefs about the likelihood of future jumps, which produces a market crash and a permanent shift in option prices. Consumption and dividends remain smooth, and the model is consistent with salient features of individual stock options, equity returns, and interest rates.     

Reducing the distance: financial services education in web-extended learning environments

It is estimated that financial services comprise around 15% of the global economy. From the supply side, one key to meeting this demand is being able to educate and certify the people who provide these services. With the advent of the internet and related technologies, the ability to deliver financial services education synchronously to both online and on-campus attendees has become a viable alternative to pure face-to-face or pure online asynchronous education. Nonetheless, one question remains: can virtual technology deliver comparable quality of financial services educational experience as face-to-face teaching? It is this question our paper addresses using the theory of transactional distance. The theory of transactional distance postulates that for optimal learning, the cognitive gap between instructor(s) and learner(s) needs to be minimized. We explore how transactional distance in financial services education varies by attendance modality (in-class, online and mixed) in a synchronous, web-extended classroom. The implications for managers and researchers are explored.     

Iterated VaR or CTE measures: A false good idea?

The purpose of this paper is twofold. Firstly, we consider different risk measures in order to determine the solvency capital requirement of a pension fund. Secondly, we illustrate the impact of the time horizon of long-term guarantee products on these capital. We consider a financial market modelled by a common Black–Scholes–Merton model. We neglect the mortality and underwriting risks by assuming that the pension fund is fully hedged against these risks, which allows us to keep understandable and tractable formulæ (the longevity risk will be a part of future researches). A portfolio is built in this market according to different strategies and the pension fund offers a fixed guaranteed rate on a certain time horizon. We begin with well-known static risk measures (value at risk and conditional tail expectation measures) and then we consider their natural dynamic generalization. In order to be time consistent, we consider their iterated versions by a backward iterations scheme. Within the dynamic setting, we show that solvency capital can be expensive and that attention must be paid to the safety level considered.     

Commonalities in the order book

This paper uses data from one of the most important European stock markets and shows that, in line with predictions from theoretical market microstructure, a small number of latent factors captures most of the variation in stock specific order books. We show that these order book commonalities are much stronger than liquidity commonality across stocks. The result that bid and ask side as well as the visible and hidden parts of the order book exhibit quite specific dynamics is interpreted as evidence that open order book markets attract a heterogeneous trader population in terms of asset valuations and impatience. Quantifying the informational content of the extracted factors with respect to the evolution of the asset price, we find that the factor information shares are highest (about 10%) for less frequently traded stocks. We also show that the informational content of hidden orders is limited.

Quality control mechanisms under capitation payment for medical services

As a result of rising health care costs, many countries, including the United States, have turned to managed care organizations and the use of capitation payment systems. Although this type of system is an effective mechanism for reducing excessive utilization of health care, it may lead to the underprovision of medical services. In this paper propensity to underprovide medical services in a prepayment system as well as the effects of auditing/monitoring on physician behaviour and patient well-being are examined. Conditions are found under which managed care yields more efficient outcomes than traditional fee-for-service care.
Suite à la croissance importante des coûts des soins, plusieurs pays, y compris les Etats Unis, ont commencéà se tourner vers des organisations spécialisées pour gérer la prestation des services et à faire usage de systèmes de rémunération per capita. Même si ce genre de système est un mécanisme efficace pour réduire l'usage excessif des service de santé, il peut entraîner une offre déficiente de services médicaux. Ce mémoire examine la propensitéà fournir moins de services dans un système de pré-paiement. On examine aussi les effets de la surveillance et de la vérification sur le comportement des médecins et sur le bien-être des patients. On met en lumière les conditions qui assurent que les soins fournis dans un tel système donneront de meilleurs résultats que la rémunération à l'acte.     

The role of fiscal policy in the St. Louis model: An evaluation and some new evidence

This paper re-examines the role of high employment budget expenditures (fiscal policy) in the St. Louis expenditure equation by using spectral analysis and the spectral estimates of a two-sided distributed lag model. The analysis is undertaken with quarterly U.S. data from 1947:1 to 1984:IV in the rate of change form. A salient conclusion is that fiscal policy has statistically significant partial coherences with (nominal) income, with the latter leading the former over the business cycle. We find that income is jointly related to lead terms of fiscal policy in a two-sided distributed lag model. Some explanations for these results are provided.