Devolution in the U.S. Welfare Reform: Divergence and Degradation in State Benefits

The Journal of Economic Inequality - The passage of the Personal Responsibility and Work Opportunity Reconciliation Act (PRWORA) in 1996 devolved responsibility for the design of welfare programs...     

Organizational structure and success of international joint ventures in emerging economies: the case of Spanish–Moroccan SMEs

One of the most common ways in which SMEs internationalize their business is through the creation of joint ventures; nevertheless, many of these fail. To avoid this risk, it is important to identify the factors that favour the continuity of such enterprises. The aim of this paper is to analyse the factors related to organizational structure that determine the success of international joint ventures between SMEs in emerging economies, taking as the particular area of study the question of joint ventures between Spanish and Moroccan firms, located in Morocco. The research hypotheses were tested using a linear regression model applied to a sample of 210 international joint ventures. The results obtained from a structured survey show that, with respect to the success of the partnership, significant factors include the existence of majority ownership by the foreign partner, management by a local CEO and the effort made by each party to adapt to the management style of the other. This research contributes to the knowledge of the main factors related to the organizational structure of joint ventures that influence the level of success achieved. The value provided by this research lies in the breadth of the sample examined, in its focus on a very common type of partnership between SMEs, on which very little has been previously studied, and in the fact that the results obtained are extensible to other realities, such as partnerships between European companies and those from countries with similar characteristics (located in Africa or in countries where an Arab culture prevails).     

Missingness Amount and Mechanisms in Family Economic Stress Research: Mapping (Non)answers to Economic-Related Variables of Fathers,Mothers, and Emerging Adult Children

The percentage of missing data among economic-related items is likely to be particularly high. This study aimed at examining the amount, mechanisms, and variables associated with missingness of different family members participating in a family economic stress study. Portuguese emerging adults (N?=?418) and their parents (N?=?748) were required to answer objective and subjective economic items and complete measures assessing individual and family psychological functioning. Results showed that, for all participants, non-response was more likely to occur among objective economic items than among subjective ones. Children presented higher percentages of item/construct-level missingness than parents, which could reflect a reduced financial awareness on the part of these family members. Although the identification of mechanisms explaining missing data proved to be complex, family members’ missingness was associated with sociodemographic and psychological indicators, suggesting that non-answers do not occur purely by chance. Implications of these findings for further family economic stress research are discussed.

     

Coverage with k-transmitters in the presence of obstacles

For a fixed integer k≥0, a k-transmitter is an omnidirectional wireless transmitter with an infinite broadcast range that is able to penetrate up to k “walls”, represented as line segments in the plane. We develop lower and upper bounds for the number of k-transmitters that are necessary and sufficient to cover a given collection of line segments, polygonal chains and polygons.     

Colorability of mixed hypergraphs and their chromatic inversions

We solve a long-standing open problem concerning a discrete mathematical model, which has various applications in computer science and several other fields, including frequency assignment and many other problems on resource allocation. A mixed hypergraph $\mathcal H $ is a triple $(X,\mathcal C ,\mathcal D )$ , where $X$ is the set of vertices, and $\mathcal C $ and $\mathcal D $ are two set systems over $X$ , the families of so-called C-edges and D-edges, respectively. A vertex coloring of a mixed hypergraph $\mathcal H $ is proper if every C-edge has two vertices with a common color and every D-edge has two vertices with different colors. A mixed hypergraph is colorable if it has at least one proper coloring; otherwise it is uncolorable. The chromatic inversion of a mixed hypergraph $\mathcal H =(X,\mathcal C ,\mathcal D )$ is defined as $\mathcal H ^c=(X,\mathcal D ,\mathcal C )$ . Since 1995, it was an open problem wether there is a correlation between the colorability properties of a hypergraph and its chromatic inversion. In this paper we answer this question in the negative, proving that there exists no polynomial-time algorithm (provided that $P \ne NP$ ) to decide whether both $\mathcal H $ and $\mathcal H ^c$ are colorable, or both are uncolorable. This theorem holds already for the restricted class of 3-uniform mixed hypergraphs (i.e., where every edge has exactly three vertices). The proof is based on a new polynomial-time algorithm for coloring a special subclass of 3-uniform mixed hypergraphs. Implementation in C++ programming language has been tested. Further related decision problems are investigated, too.     

Disparities in Gender Preference and Fertility: Southeast Asia and Latin America in a Comparative Perspective

Population Research and Policy Review - A preference for sons and a sex selection against females are widespread in vast regions of the world, including a great number of Asian and East European...     

Comparative assessment of analytical approaches to quantify the risk for introduction of rare animal diseases: the example of avian influenza in Spain

Trade of animals and animal products imposes an uncertain and variable risk for exotic animal diseases introduction into importing countries. Risk analysis provides importing countries with an objective, transparent, and internationally accepted method for assessing that risk. Over the last decades, European Union countries have conducted probabilistic risk assessments quite frequently to quantify the risk for rare animal diseases introduction into their territories. Most probabilistic animal health risk assessments have been typically classified into one-level and multilevel binomial models. One-level models are more simple than multilevel models because they assume that animals or products originate from one single population. However, it is unknown whether such simplification may result in substantially different results compared to those obtained through the use of multilevel models. Here, data used on a probabilistic multilevel binomial model formulated to assess the risk for highly pathogenic avian influenza introduction into Spain were reanalyzed using a one-level binomial model and their outcomes were compared. An alternative ordinal model is also proposed here, which makes use of simpler assumptions and less information compared to those required by traditional one-level and multilevel approaches. Results suggest that, at least under certain circumstances, results of the one-level and ordinal approaches are similar to those obtained using multilevel models. Consequently, we argue that, when data are insufficient to run traditional probabilistic models, the ordinal approach presented here may be a suitable alternative to rank exporting countries in terms of the risk that they impose for the spread of rare animal diseases into disease-free countries.     

On How Firms Located in an Industrial District Profit from Knowledge Spillovers: Adoption of an Organic Structure and Innovation Capabilities

The canonical approach argues that firms located in industrial districts enjoy advantages for both innovation and performance as a consequence of the exceptionally strong knowledge spillovers that flow freely and spontaneously within them. However, diffusion of shared competences is not as easy and free as postulated in the literature. Using the resource‐based view, we study whether clustered firms perform better than non‐clustered firms, by providing empirical evidence that location of firms in an industrial district does not directly create innovation capabilities or economic rents. This research question is important because it enables us to better understand how firms benefit from this external knowledge flow, both to create advantages in technological innovation and to obtain superior organizational performance. To stand out in capabilities that are often localized at the centre of the same industrial district, a firm needs to develop a learning internal micro‐environment capable of better absorbing localized knowledge spillovers. In particular, the organic form is revealed as a configuration well suited to combining structural flexibility with the productive flexibility offered by the district and to strengthening technological innovation capabilities, thus improving organizational performance.     

Mixture of Maximal Quasi Orders: a new Approach to Preference Modelling

Normative theories suggest that inconsistencies be pointed out to the Decision Maker who is thus given the chance to modify his/her judgments. In this paper, we suggest that the inconsistencies problem be transferred from the Decision Maker to the Analyst. With the Mixture of Maximal Quasi Orders, rather than pointing out incoherences for the Decision Maker to change, these inconsistencies may be used as new source of information to model his/her preferences.     

Strategyproof single unit award rules

The problem of allocating a single indivisible unit to one of several agents is considered, where monetary compensations are not allowed, and the unit is not necessarily desirable to each agent. In addition to strategyproofness, three properties of social choice functions are considered: Pareto-optimality, nondictatorship, and nonbossiness. It is shown that these three additional criteria cannot be satisfied simultaneously. However, any two of the additional criteria can be satisfied. We give characterizations of the classes of strategyproof social choice functions satisfying these three pairs of properties. Received: 18 February 1998/Accepted: 15 May 2000