Households, poverty and policy in times of crisis. Mexico, 1992-1996

Includes bibliography

Employment challenges and policy responses in Argentina, Brazil and Mexico

Includes bibliography

The economics of demand-led growth: theory and evidence for Brazil

Includes bibliography

Tendencias demográficas y opciones para políticas de población en América Latina = Population trends and policy alternatives in Latin America

Incluye Bibliografía

Note on the nonuniqueness of the massive Fierz-Pauli theory and spectator fields

It is possible to show that there are three independent families of models describing a massive spin-2 particle via a rank-2 tensor. One of them contains the massive Fierz-Pauli model, the only case described by a symmetric tensor. The three families have different local symmetries in the massless limit and can not be interconnected by any local field redefinition. We show here, however, that they can be related with the help of a decoupled and nondynamic (spectator) field. The spectator field may be either an antisymmetric tensor B μν=-Bνμ, a vector Aμ or a scalar field φ, corresponding to each of the three families. The addition of the extra field allows us to formulate master actions which interpolate between the symmetric Fierz-Pauli theory and the other models. We argue that massive gravity models based on the Fierz-Pauli theory are not expected to be equivalent to possible local self-interacting theories built up on top of the two new families of massive spin-2 models. The approach used here may be useful to investigate dual (nonsymmetric) formulations of higher-spin particles. © 2013 American Physical Society.

Women in water-related processes in Latin America: current situation and research and policy proposals

Includes bibliography

Agroforestry in the Amazon Basin: practice, theory and limits of a promising land use

Includes bibliography

Caribbean shipping sector: a planning and policy perspective

Includes bibliography

The Caribbean shipping sector: a planning and policy perspective: draft

Includes bibliography

Moeda e política monetária: duas visões

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Fiscal trends and policy issues and implications for the Caribbean

Includes bibliography