Institutions and the rise of taxes on labour in the OECD

Institutions and the Rise of Taxes on Labour in the OECD. —The aim of this paper is to explain differences among OECD countries in the evolution of taxes on labour during the last two decades. Its main message is that these taxes are to an important extent structurally and institutionally determined. Tax rates on labour are shown to have risen more strongly in countries where: (i) government has been controlled mainly by leftist parties; (ii) taxes (in general) are decided and collected mainly by central government (fiscal centralization); (iii) coalition and minority governments are frequent; (iv) the partisan composition (political colour) of these coalitions is unstable; (v) the labour market is neither centralized nor decentralized.     

No Arbitrage Condition for Positive Diffusion Price Processes

Using the Ray-Knight theorem we give conditions for anonnegative diffusion without drift to reach zero or not. These results also givenecessary and sufficient conditions for such a diffusion process to be a martingale (and notjust a local martinagle). We apply these results in order to give necessary and sufficientconditions for nonnegative diffusion to have equivalent local martingale measures.     

Exponential Hedging and Entropic Penalties

We solve the problem of hedging a contingent claim B by maximizing the expected exponential utility of terminal net wealth for a locally bounded semimartingale X . We prove a duality relation between this problem and a dual problem for local martingale measures Q for X where we either minimize relative entropy minus a correction term involving B or maximize the Q -price of B subject to an entropic penalty term. Our result is robust in the sense that it holds for several choices of the space of hedging strategies. Applications include a new characterization of the minimal martingale measure and risk-averse asymptotics.     

Coherent Measures of Risk

In this paper we study both market risks and nonmarket risks, without complete markets assumption, and discuss methods of measurement of these risks. We present and justify a set of four desirable properties for measures of risk, and call the measures satisfying these properties "coherent." We examine the measures of risk provided and the related actions required by SPAN, by the SEC/NASD rules, and by quantile-based methods. We demonstrate the universality of scenario-based methods for providing coherent measures. We offer suggestions concerning the SEC method. We also suggest a method to repair the failure of subadditivity of quantile-based methods.     

Does Homeownership Lead to Longer Unemployment Spells? The Role of Mortgage Payments

This paper examines the impact of housing tenure choice on unemployment duration in Belgium using EU-SILC micro data. We contribute to the literature in distinguishing homeowners with mortgage payments and outright homeowners. Accounting for tenure endogeneity and unobserved heterogeneity, we find that homeowners with a mortgage exit unemployment first, while outright owners stay unemployed the longest. Tenants take an intermediate position. Our results emphasize the key role of housing costs in the link between housing tenure and labour market outcomes. Considered together with the results of recent macroeconomic research on housing and employment in Belgium, this paper provides indirect evidence for significant negative effects of homeownership on the labour market and the economy beyond the owners themselves.     

A von Neumann–Morgenstern representation result without weak continuity assumption

In the paradigm of von Neumann and Morgenstern (1947), a representation of affine preferences in terms of an expected utility can be obtained under the assumption of weak continuity. Since the weak topology is coarse, this requirement is a priori far from being negligible. In this work, we replace the assumption of weak continuity by monotonicity. More precisely, on the space of lotteries on an interval of the real line, it is shown that any affine preference order which is monotone with respect to the first stochastic order admits a representation in terms of an expected utility for some nondecreasing utility function. As a consequence, any affine preference order on the subset of lotteries with compact support, which is monotone with respect to the second stochastic order, can be represented in terms of an expected utility for some nondecreasing concave utility function. We also provide such representations for affine preference orders on the subset of those lotteries which fulfill some integrability conditions. The subtleties of the weak topology are illustrated by some examples.     

ARBITRAGE AND FREE LUNCH WITH BOUNDED RISK FOR UNBOUNDED CONTINUOUS PROCESSES

We give two examples showing that for unbounded continuous price processes, the no-free-lunch assumption and the existence of an equivalent martingale measure are not equivalent. In fact it turns out that the notion of an equivalent local martingale measure is natural in this context.     

AUCTIONS,EX POST COMPETITION AND PRICES: THE EFFICIENCY OF PUBLIC‐PRIVATE PARTNERSHIPS*

ABSTRACT ** : Using an original database concerning 1102 French local public authorities in 2001, we explore the relationships between prices charged by private operators in water contracts and ex post competition. We show that prices charged in contracts in which operators are in a monopoly situation throughout the duration of the contract, are not affected by a ‘competition effect’ between private operators. However, a competition effect between private operators and public management appears to be crucial in explaining prices combined with a ‘termination effect’, reflecting the fact that the contract is close to being renewed, and hence re‐auctioned.