Hölder continuity of the policy function approximation in the value function approximation

We show that given a value function approximation V of a strongly concave stochastic dynamic programming problem (SDDP), the associated policy function approximation is Hölder continuous in V.     

Instrumental values

This paper studies identification of partial differences of nonseparable structural functions. A model is defined which admits structural functions exhibiting a degree of monotonicity with respect to a latent variate. The model identifies partial differences when there are instrumental values of covariates over which the latent variate exhibits a local quantile invariance, and a local order condition holds. The result is useful when covariates exhibit discrete variation, as arises often in practice, and when restricting latent variates and covariates to be statistically independent is unpalatable. The results are illustrated with data from the returns-to-schooling study of Angrist and Krueger [1991. Does compulsory schooling attendance affect schooling and earnings? Quarterly Journal of Economics 106, 979–1014].     

Adjusting to not being "on top": making effective use of transitions

In today's health care environment, it is possible even for the successful health care manager to be fired or demoted. To ensure continued success, the manager must view a termination or demotion as a normal transition of life and find ways to "move on". Given today's volatile environment, anticipatory planning for job loss or job change, which includes attention to continued professional training, visioning changes in health care, and maintaining strong professional contacts, is an imperative.     

Asymptotically optimal estimation of smooth functionals for interval censoring, part 2

Estimation in the interval censoring model is considered. A class of smooth functionals is introduced, of which the mean is an example. We consider case 2, with two observation times for each unobservable event time, in the situation that the observation times cannot become arbitrarily close to each other. It is proved that the nonparametric maximum likelihood estimator of the functional asymptotically reaches the information lower bound.     

Will Labour’s Economic Programme Work?

If Labour is elected to government on 1 May, it will inherit the lowest inflation of any incoming government over the last fifty years but the highest unemployment. At the same time, public borrowing is running at an unsustainable high level. In this article, Andrew Sentance examines Labour's plans to expand employment while reducing public borrowing and containing inflation. He argues that Labour's economic programme could work but a number of pitfalls need to be avoided. Monetary policy will need to be tightened after the Election and the fiscal squeeze implied by Conservative spending plans maintained – if necessary through higher taxes. The benefits from Labour's employment policies could also be undermined by a high minimum wage, particularly if applied to young workers.     

Economic Sociology Reformulated

A bstract Previous theoretical and empirical research on economic sociology leaves much to be desired in terms of consistently defining the agenda and objectives of the discipline As a result, economic sociology often appears to lack a clearly defined mission and purpose This is epitomized by various failures to establish adequate epistemological relations of the proper realm of economic sociology with those of economics and sociology, and especially with the domain of rational choice theory This failure is compounded by a misplaced distinction between the subject matter of economic sociology and that of sociological economics, or socioeconomics And some recent works in the discipline (including the ambitious Handbook of Economic Sociology ) have not helped to remedy this situation In this paper, we try to address this situation by suggesting some reformulations of the subject matter of economic sociology in relation to those of related disciplines In addition, we attempt to redefine the field of the sociology of the market which is seen as the focal specialty of economic sociology     

A General Method of Deriving the Inefficiencies of Banks from a Profit Function

This article develops a new method of estimating inefficiencies in joint production and shows that unlike the approaches utilized in the previous studies of inefficiency, this method maintains a consistent relationship between the error term of a profit function and the error terms of its price derivatives. A useful by-product of the method is a proof of a Hotelling-like lemma that relates stochastic input demand and output supply functions to stochastic profit functions. While the previous studies fit a single frontier to data on all firms, this paper estimates a frontier unique to every observed firm to allow each one to have a different potential of achieving maximal levels of profit. The new method is applied in the analysis of annual data, 1984–1989, for U.S. commercial banks. Both the analytical and numerical results of the paper show that the residual that the previous studies attribute to inefficiency includes the effects of excluded variables and of inaccuracies in the specified functional forms. Once accurate estimates of these effects are subtracted from the residual, the distortions in the measured inefficiencies should be considerably reduced. Consequently, this article considers how such estimates might be obtained.     

Job satisfaction and gender: Why are women so happy at work?

By most objective standards, women's jobs are worse than men's, yet women report higher levels of job satisfaction than do men. This paper uses a recent large-scale British survey to document the extent of this gender differential for eight measures of job satisfaction and to evaluate the proposition that identical men and women in identical jobs should be equally satisfied. Neither the different jobs that men and women do, their different work values, nor sample selection account for the gender satisfaction differential. The paper's proposed explanation appeals to the notion of relative well-being, especially relative to workers' expectations. An identical man and woman with the same jobs and expectations would indeed report identical job satisfaction, but women's expectations are argued to be lower than men's. This hypothesis is supported by the finding that the gender satisfaction differential disappears for the young, the higher-educated, professionals and those in male-dominated workplaces, for all of whom there is less likely to be a gender difference in job expectations.     

Contextual Influences on Thinking in Organizations: Learner and Tutor Orientations to Organizational Learning

This paper examines the orientations, or frames of reference, of participants in five bank training programmes run by three banks in the United Kingdom. Adopting a symbolic interactionist approach and ethnographic methods of investigation, the paper attempts to elucidate the ways in which both learners and tutors thought about their roles in the learning events and the goals and strategies they adopted in order to cope with their situation. It is suggested that in order to understand the participants' behaviour it is necessary to take into account the contexts in which their actions were constructed. In particular it is proposed that the organizational context of the training programmes, which exposed the participants to the gaze of ‘hidden audiences’ of organizational superiors, inhibited the potential of the programmes as vehicles for learning. It is also argued that interactionist approaches using ethnographic methods, which enable organizational actors to be studied in situ, have an important contribution to make to the wider study of organizational cognition.