Dados é uma das principais e mais longevas publicações nas ciências sociais no Brasil. Criada em 1966, divulga trabalhos inéditos e inovadores, oriundos de pesquisa acadêmica, de autores brasileiros e estrangeiros. Editada pelo IESP-UERJ, é seu objetivo conciliar o rigor científico e a excelência acadêmica com ênfase no debate público a partir da análise de questões substantivas da sociedade e da política.
Dados vol. 49 n. 2 Rio de Janeiro 2006
Resumo
This article seeks to identify the determinants of the existence and powers of upper legislative chambers. By analyzing their constitutionally established powers, including all of the minimally democratic bicameral countries, it was possible to reach conclusions not previously suggested in the literature. Using a two-step model whose calculation includes the possibility of a selection bias (Heckman model), the study evaluated both the factors leading to the existence of an upper chamber and those defining its powers. Federalism proved to be an important variable for explaining the difference between bicameral and unicameral countries, but not for explaining the political strength of upper chambers. The most relevant explanatory variable in this sense was the system of government: in Parliamentary systems, upper chambers have limited powers; in Presidential systems they exercise broad powers.
Palavras-chave: Senates; upper chambers; bicameralism; Federalism; Presidentialism; Legislative Branch; checks and balances.
DOI: 10.1590/S0011-52582006000200002
Os determinantes da existência e dos poderes das câmaras altas: federalismo ou presidencialismo?
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