Has machine learning rendered simple rules obsolete?

European Journal of Law and Economics - Epstein (Simple rules for a complex world, Harvard University Press, Cambridge, 1995) defended the superiority of simple legal rules over complex,...     

Trends in the proportion of married women of reproductive age in Spain, 1887–1991

Using the Princeton nuptiality index I_m, we analyzed historical developments in the proportion of married women of reproductive age in Spain. We show the internal diversity in nuptiality patterns and offer an explanatory statistical model based on panel data analysis to identify the main variables influencing these changes over more than a century (1887–1991). We found that Spain has been the developed country with the greatest contrasts in its provincial nuptiality patterns (measured by I_m), although this diversity has lessened over the course of time. We also found that some socioeconomic variables (the gross domestic product per capita and the percentage of population living in cities) do not have a linear relationship with female nuptiality but rather have a U shape or an inverted U shape. This may partly account for some of the controversy that has raged on this topic over the past few decades on an international level.     

The AIDS epidemic in Brazil: Public health and community responses

Brazil boasts one of the world's most successful programmes to confront the HIV/AIDS epidemic, in spite of the country's rather low social and health indicators. The government recognised early the threat that HIV/AIDS posed to Brazil, and initiated a great number of programmes. However, the success of prevention programmes, assistance to those infected and control of the epidemic in Brazil are the result of a combination of political will, technical and human resource capacity, adequate funding and, most important, social mobilisation.     

Ritual Demonstrations versus Reactive Protests: Participation Across Mobilizing Contexts in Mexico City

Using an innovative survey of protest participants and nonparticipants from five major street demonstrations in Mexico City in 2011 and 2012, this study tests the assumption that influences on protest participation vary across different types of events; namely, ritual demonstrations and reactive protests. The comparison is based on two assumptions: that these are two of the dominant forms of protest in contemporary Latin America, and that specifying the context for different types of social movement participation provides a better understanding of the individual mobilization process for groups seeking to defend their rights or gain new benefits. The comparative analyses reveal some crucial differences. Political interest and previous political experience are more influential in the decision to take part in reactive demonstrations. For ritual demonstrations, the decision to participate tends to be driven more by personal and organizational connections.     

The extent of the population paradox in the Hungarian electoral system

The Hungarian mixed-member electoral system, adopted in 1989, is one of the world’s most complicated electoral systems, and, as this paper demonstrates, it suffers from the “population paradox.” In particular, the governing coalition may lose as many as 8 seats either by getting more votes or by the opposition obtaining fewer votes on each territorial list.     

Understanding food security and international security links in the context of climate change

Food production has been changing significantly in recent years as a result of climate change and of growing demand for food. This article aims to understand the link between food security and international security in the context of climate change, applying a systematic and qualitative analysis of the literature using the bibliometric method. This research observes that climate change tends to affect agricultural productivity, exposing societies to risk and the need for migration. However, good governance, together with international cooperation, can reduce the hazards of food insecurity, strengthening ties between countries and stimulating a fairer and more inclusive form of international trade.