On approximating the Indirect Malmquist Productivity Indices by Fisher indices

In this paper it is shown that under certain assumptions the Cost Indirect Malmquist Productivity Index, which is a natural productivity measure for a cost constrained firm, can be approximated as the ratio of the Fisher output quantity index and the cost index.The views expressed in this paper are those of the author and do not necessarily reflect the policies of Statistics Netherlands.     

Asymptotic linearity of minimax estimators

The celebrated local asymptotic minimax (LAM) theorem due to HÁjek (1972) also includes the statement that a LAM estimator Is necessarily asymptotically linear. A similar result. is true for semi-parametric models, but Hájek's result doesn't apply to this case as the efficient influence function is often not contained in the (proper) tangent space. This note gives a simple, elementary proof of both the LAM theorem and the necessity of asymptotic linearity of a LAM estimator sequence.     

Differentiability of the value function without interiority assumptions

This paper studies first-order differentiability properties of the value function in concave dynamic programs. Motivated by economic considerations, we dispense with commonly imposed interiority assumptions. We suppose that the correspondence of feasible choices varies with the vector of state variables, and we allow the optimal solution to belong to the boundary of this correspondence. Under minimal assumptions we prove that the value function is continuously differentiable. We then discuss this result in the context of some economic models, and focus on some examples in which our assumptions are not met and the value function is not differentiable.     

The likelihood of dubious election outcomes

Summary. A disturbing phenomenon in voting, which causes most of the problems as well as the interest in the field, is that election outcomes (for fixed preferences) can change with the way the ballots are tallied. This causes difficulties because with each possible choice, some set of voters can be dubious about whether it is the “correct” one. But, how likely are these settings allowing multiple election outcomes? By combining properties of the geometry of voting developed by Saari with a analytic-geometric technique created by Schlafli, we determine the likelihood that a three candidate election can cause these potentially dubious outcomes. Received: April 11, 1997; revised version: November 12, 1997     

A turnpike property of optimal programs for a class of simple linear models of production

Summary. This paper establishes a ‘turnpike theorem’ for a closed linear model of production with a primitive input requirement matrix. Optimal programs of resource allocation have a ‘turnpike property’ if the growth factor of every sector in the economy converges, in the long run, to a common value. The usefulness of such a theorem is due to the fact that the input requirement matrix for an economy with a large number of goods may be primitive (some power of the matrix is strictly positive). Received: April 19, 1998; revised version: July 15, 1998     

The preferential option for the poor and the Marxian-Christian perspective on distributive justice

Using a social economics perspective, this essay examines the positive and negative effects of job security, insecurity and the perceptions thereof on the welfare of workers, organizations, and society, as well as policy options that could alleviate the negative socio-economic consequences of job insecurity. The essay questions perceived job insecurity as a device to increase worker effort, both on efficiency and ethical grounds. It also suggests that increased perceptions of job insecurity have adversely affected workers' well-being and have undesirable macroeconomic and social effects. Public policy makers and researchers should examine ways to minimize the negative consequences associated with involuntary job loss. They should also consider to what extent both limiting firms' ability to layoff workers and providing incentives to firms that downsize to use alternatives to layoffs are socially desirable.     

NO‐ARBITRAGE PRICING FOR DIVIDEND‐PAYING SECURITIES IN DISCRETE‐TIME MARKETS WITH TRANSACTION COSTS

We prove a version of First Fundamental Theorem of Asset Pricing under transaction costs for discrete‐time markets with dividend‐paying securities. Specifically, we show that the no‐arbitrage condition under the efficient friction assumption is equivalent to the existence of a risk‐neutral measure. We derive dual representations for the superhedging ask and subhedging bid price processes of a contingent claim contract. Our results are illustrated with a vanilla credit default swap contract.     

基于科斯定理的我国地质公园管理模式探析

在世界地质公园网络计划的推动下,我国地质公园发展迅速,然而管理水平却相对滞后,存在产权不清、政企不分、协调不力等问题,严重影响了地质公园综合效益的发挥。针对这些问题,在分析专家建议的基础上,依据科斯定理,从＂产权—效率＂角度,构建了覆盖全行业、全方位、权威的地质公园管理模式。     

Teaching Economics to Trade Unionists

This audience for economic education has special pedagogical and subject matter needs from instructors. The rewards to both, however, outweigh the efforts required.