The decision to adopt e-commerce technology depends on a variety of variables. This paper explores the relative importance of structural firm-specific variables, the intrinsic value of the technology, expectations concerning the evolution of the technology, and the adoption behaviour of other...

In this paper, we describe a new Stata command, stlh, which estimates and tests for the significance of the time-varying regression coefficients in Aalen's linear hazards model; see Aalen (1989). We see two potential uses for this command. One may use it as an alternative to a proportional...

The new book Long and Freese (2001) is reviewed. Copyright 2002 by Stata Corporation.

For many problems of statistical inference in regression modelling, the Fisher information matrix depends on certain nuisance parameters which are unknown and which enter the model nonlinearly. A common strategy to deal with this problem within the context of design is to construct maximin...

En este artículo se realiza una introducción a la valoración económica en el sector de la numismática. A tal efecto, se describen las variables explicativas más importantes del valor de mercado de una moneda, calculando un modelo de regresión múltiple. Las variables más representativas...