Modification of Semivalues for Games with Coalition Structures

Consideration of reference systems for semivalues leads us to a global representation of the action of a semivalue on a game. Using this representation, we show how to modify semivalues to take account of coalition structures on the player set. The players' allocations according to a semivalue, including a modified semivalue, can be computed by means of products of matrices obtained from the multilinear extension of the game.     

Power of Enforcement and Dictatorship

A new Arrovian impossibility is obtained without invoking independence of irrelevant alternatives type assumptions. The new conditions leading to the impossibility are based on the concept of power of enforcement, and specify how this power can (see A3) or cannot be expanded (see A1, A2 and A4).     

Expected utility from additive utility on semigroups

In the present paper we study the framework of additive utility theory, obtaining new results derived from a concurrence of algebraic and topological techniques. Such techniques lean on the concept of a connected topological totally ordered semigroup. We achieve a general result concerning the existence of continuous and additive utility functions on completely preordered sets endowed with a binary operation ``+', not necessarily being commutative or associative. In the final part of the paper we get some applications to expected utility theory, and a representation theorem for a class of complete preorders on a quite general family of real mixture spaces.     

Weight matrices for social influence analysis: An investigation of measurement errors and their effect on model identification and estimation quality

Weight matrices, such as used in network autocorrelation models, are useful to investigate social influence processes. The objective of this paper is to investigate a key topic that has received relatively little attention in previous research, namely the issues that arise when observational limitations lead to measurement errors in these weight matrices. Measurement errors are investigated from two perspectives: when relevant ties are omitted, and when irrelevant ties are erroneously included as part of the matrix. The paper first shows analytically that these two situations result in biased estimates. Next, a simulation experiment provides evidence of the effect of erroneously coding the weight matrix on model performance and the ability of a network autocorrelation test to identify social influence effects. The results suggest that depending on the level of autocorrelation and the topology attributes of the underlying matrix, there is a window of opportunity to identify and model social influence processes even in situations where the ties in a matrix cannot be accurately observed.     

Centre and periphery: Two speeds for the implementation of public relations in Spain

In this qualitative study conducted at the Rovira i Virgili University we show that there are clearly two speeds for the implementation of public relations in Spain: one in the big cities (basically Madrid and Barcelona) and one in the smaller cities or regions of secondary economic importance, such as Tarragona, where the degree of professionalisation is noticeably lower.     

New evidence on the fertility transition in Ireland 1880–1911

Recent analyses of Ireland's marital fertility transition based on the Princeton Ig and the Stanford CPA measures are reassessed. Revised county estimates of Ig are subjected to regression analysis, and added insight into CPA is offered by comparing Ireland with Scotland and applying the measure to three specially constructed local data sets.     

Broadening the scope: Gender and international economic development

The central claim of this essay is that gender is a key term for understanding economic development insofar as it reveals fundamental aspects in the organization of production and labor. Following a cursory review of influential approaches to development and their relationship to the parallel theorization of gender, I compare two recent modalities of industrial restructuring: the expansion of export-processing plants (maquiladoras) along the U.S.-Mexico border and the survival strategies of electronics firms in Southern California. My theoretical focus is on the specification of gender as a process that allows for the maintenance of a substratum of labor, predominantly female, outside of market exchanges. That labor is recurrently tapped by employers seeking competitive edges in domestic and international markets. The same mechanism enables the replication of patterns of unequal exchange through the articulation of two interdependent models of production — one domestic and one market oriented — by which capitalist accumulation is fulfilled.     

Some advances in the study of the compatibility of three bivariate copulas

Summary In this paper we study the problem of the compatibility of three bivariate copulas, i.e., we look for conditions which allow us to assure the existence of a three-copula whose two-dimensional margins are given. As a particular case, we seek conditions for two bivariate copulasC ₁ andC ₂ under whichC ₂[C₁ (x, y), z] is a three-copula. We specifically study the compatibility of the copulasM, W andII with other copulas both in general and in the particular case. We also study the compatibility of a two-copula with convex linear combinations of other two-copulas. Several examples illustrate the results obtained in each case, and some applications are given.