ZONING UNDER SPATIAL PRICE DISCRIMINATION

This paper investigates zoning in a duopoly model of spatial price discrimination. We find that the zone in which the firms are not allowed to locate depends on the bias of the regulator. A bias toward firms is deduced when locations around the central area are forbidden, and a bias toward consumers exists when firms are only allowed to locate at places around the central area. The design of the zoned area guarantees that firms locate optimally and works under simultaneous or sequential choice of locations by the two firms. (JEL L13, R38)     

Public Administration and Organizational Theory: Prescribing the Proper Dose

Public Organization Review - Since the founding of the field of public administration, scholars have struggled with questions related to the “publicness” of public organizations...     

THE DURATION OF FIRM‐DESTINATION EXPORT RELATIONSHIPS: EVIDENCE FROM SPAIN, 1997–2006

This article uses survival analysis to investigate the duration of Spanish firms' trade relationships by destination over 1997–2006. Whereas firm export status is highly persistent, firms' destination portfolio is very dynamic: a typical firm‐country exporting relationship has a median duration of 2 years. Yet, if a firm manages to export to a country beyond 2 years the risk of exiting that market sharply falls afterwards. The results indicate that not only firm heterogeneity but also destination heterogeneity are crucial to explain survival in export markets. In particular, country (political) risk heavily shapes the effect of firm, product, and other destination characteristics on the length of trade relationships. Whereas firm productivity, comparative advantage, partners' GDP, and proximity enhance duration of trade with low‐risk countries, they have no effect on trade survival with high‐risk countries. On the contrary, information spillovers are particularly relevant to enhance survival of trade relationships with high‐risk countries. (JEL C41, F10, F14)     

An Age-Structured Model for Childhood Obesity

An age-structured model for childhood obesity at population level is fitted to empirical data in order to predict the proportion of overweighted and obese children in the 6–8 and 9–12 year old classes in the region of Valencia, Spain.     

A Sociology of Human Rights: Rights through a Social Movements Lens

Cet article propose un cadre théorique pour développer une sociologie des droits humains en s'intéressant aux mouvements sociaux dans le but de comprendre les cultures de droits locales. Si le droit humain est une idée qui se développe historiquement principalement à travers l'État, on remarque qu'au Canada, les avancées des droits de l'homme sont le fait de militants travaillant sur le terrain. Dans cet article, on explore aussi les écrits en sociologie au Canada. Les auteurs argumentent qu'on observe un sérieux manque d'engagement de la part des sociologues anglophones et francophones au Canada et que trop peu d'entres eux proposent de réelles études nationales. Évidemment, l'accès restreint à l'information législative représente un obstacle sérieux à la recherche académique au Canada. This article offers a framework for developing a sociology of human rights using social movements to understand local rights cultures. The idea of human rights has historically been highly statist, but grass‐roots activism has been at the heart of the most profound human rights advances in Canada. The article also raises questions about the current state of sociological writing about Canada. The author contends that there is a serious lack of engagement among English and French sociologists, and too few scholars provide genuine “national” studies. Moreover, restrictive access to information legislation represents a serious obstacle to academic research in Canada.     

Goodness‐of‐Fit Test for Monotone Functions

Abstract. In this article, we develop a test for the null hypothesis that a real‐valued function belongs to a given parametric set against the non‐parametric alternative that it is monotone, say decreasing. The method is described in a general model that covers the monotone density model, the monotone regression and the right‐censoring model with monotone hazard rate. The criterion for testing is an ‐distance between a Grenander‐type non‐parametric estimator and a parametric estimator computed under the null hypothesis. A normalized version of this distance is shown to have an asymptotic normal distribution under the null, whence a test can be developed. Moreover, a bootstrap procedure is shown to be consistent to calibrate the test.     

The Dantzig Selector in Cox's Proportional Hazards Model

Abstract. The Dantzig selector (DS) is a recent approach of estimation in high‐dimensional linear regression models with a large number of explanatory variables and a relatively small number of observations. As in the least absolute shrinkage and selection operator (LASSO), this approach sets certain regression coefficients exactly to zero, thus performing variable selection. However, such a framework, contrary to the LASSO, has never been used in regression models for survival data with censoring. A key motivation of this article is to study the estimation problem for Cox's proportional hazards (PH) function regression models using a framework that extends the theory, the computational advantages and the optimal asymptotic rate properties of the DS to the class of Cox's PH under appropriate sparsity scenarios. We perform a detailed simulation study to compare our approach with other methods and illustrate it on a well‐known microarray gene expression data set for predicting survival from gene expressions.     

A reexamination of stein's antifiducial example

In Stein's 1959 example, for any sample with n sufficiently large, there is a confidence set embedded simultaneously within two regular confidence belts—one with coverage frequency smaller than an arbitrary positive ϵ, the other with coverage frequency larger than 1 — ϵ. Thus, Stein's example may be seen as an extreme case of mutually conflicting confidence statements, illustrating a possibility anticipated and denounced by Fisher.     

Sources of error in reported childlessness in a continuous British household survey

A recent investigation of the British General Household Survey (GHS) found substantial over-reporting of childlessness in recent years, particularly at older ages. We examine the phenomenon in further detail and find that the principal cause was change in survey procedures. To some extent the bias can be corrected for by using information on own children in the household. Revised fertility histories give period estimates of total fertility that are in close agreement with national vital registration statistics, unlike those based on original fertility histories of recent years. Misreporting in fertility histories dates primarily from administrative changes in the GHS in the years 1998-2000, and particularly from 2003, when the option of laptop self-completion (CASI) was introduced for reporting demographic histories.