[EN] This paper considers the estimation of the effect of vocational education on the probability of employment using Spanish data from the linked Active Population Survey (EPA) since 1992 to 1997. After allowing for possible sample-selection bias and heteroskedasticity in estimation, only...

We present an algorithmic approach for solving two-stage stochastic mixed 0-1 problems. The first stage constraints of the Deterministic Equivalent Model have 0--1 variables and continuous variables. The approach uses the Twin Node Family (TNF) concept within the algorithmic framework so-called...

[Background] There is an agreement in the fact that cancer incidence in transplant recipients increases at a rate disproportionately greater than in the general population. Several clinical studies have identified cancer risk factors, such as age, male gender, tobacco, UV radiation, viral...

This paper considers the persistence found in the volatility of many financial time series by means of a local Long Memory in Stochastic Volatility model and analyzes the performance of the Gaussian semiparametric or local Whittle estimator of the memory parameter in a long memory signal plus...

The literature on mergers has extensively analyzed the decision to merge by private firms but it has not considered the decision to merge by private and public firms. We assume that when a private firm and a public firm merge (or when one of them acquires the other), they sets up a multiproduct...

The purpose of this paper is to study how the choice of environmental standards by governments is affected by the existence of wage incomes when firms' location is endogenous. In developed countries labor is unionized, which allows positive wage incomes to arise. Thus, each government has...

[EN] We try to study the quality of life in Donostia, in the sense that we want to study the relationship that can exist among those inhabitants of the housings and the structure of the same ones. We will attempt to look for a link among inhabitant's type, housing type and homogeneous areas of...

Betas play a central role in modern finance. The estimation of betas from historical data and their extrapolation into the future is of considerable practical interest. We propose two new methods: the first is a direct generalization of the method in Blume (1975), and the second is based on...

[EN] Multiple Correspondence Analysis (MCA) studies the relationship between several categorical variables defined with respect to a certain population. However, one of the main sources of information are those surveys in which it is usual to find a certain number of absent data and conditioned...

[EN] The relationship between the unemployment and the international immigration is getting interest while the differences between poor and rich countries are stressed. The poor countries offer cheap work force to occupy less qualified jobs in rich countries, with citizen increasingly demanding...