Political Science and the Practical Problem of Peace
In: The Western political quarterly: official journal of Western Political Science Association, Band 12, Heft 4, S. 917
ISSN: 0043-4078
In: The Western political quarterly: official journal of Western Political Science Association, Band 12, Heft 4, S. 917
ISSN: 0043-4078
In: The Western political quarterly, Band 12, Heft 4, S. 917-931
ISSN: 1938-274X
In: The Western political quarterly: official journal of Western Political Science Association, Band 12, S. 917-931
ISSN: 0043-4078
In: World affairs: a journal of ideas and debate, Band 103, S. 75-78
ISSN: 0043-8200
In: Journal of peace research, Band 51, Heft 4, S. 528-540
ISSN: 1460-3578
Sample selection models, variants of which are the Heckman and Heckit models, are increasingly used by political scientists to accommodate data in which censoring of the dependent variable raises concerns of sample selectivity bias. Beyond demonstrating several pitfalls in the calculation of marginal effects and associated levels of statistical significance derived from these models, we argue that many of the empirical questions addressed by political scientists would – for both substantive and statistical reasons – be more appropriately addressed using an alternative but closely related procedure referred to as the two-part model (2 PM). Aside from being simple to estimate, one key advantage of the 2 PM is its less onerous identification requirements. Specifically, the model does not require the specification of so-called exclusion restrictions, variables that are included in the selection equation of the Heckit model but omitted from the outcome equation. Moreover, we argue that the interpretation of the marginal effects from the 2 PM, which are in terms of actual outcomes, are more appropriate for the questions typically addressed by political scientists than the potential outcomes ascribed to the Heckit results. Drawing on data from the Correlates of War database, we present an empirical analysis of conflict intensity illustrating that the choice between the sample selection model and 2 PM can bear fundamentally on the conclusions drawn.
In: Journal of peace research, Band 51, Heft 4, S. 528-540
ISSN: 0022-3433
World Affairs Online
In: PS: political science & politics, Band 13, Heft 1, S. 80-88
ISSN: 0030-8269, 1049-0965
World Affairs Online
In: The Atlantic community quarterly, Band 23, Heft 3, S. 285
ISSN: 0004-6760
In: Government & opposition: an international journal of comparative politics, Band 6, Heft 3, S. 277-302
ISSN: 1477-7053
PROFESSOR LAZARSFELD ONCE REFERRED TO SOCIOLOGY AS BEING IN A sense a residuary legatee, the surviving part of a very general study, out of which specializations have successively been shaped.The same might be said of political science. In the West the first deliberate and reflective studies of political life were made in Greece at the end of the th century BC, and in the succeeding century. The histories of Herodotus and Thucydides, some of the pamphlets attributed to Xenophon, above all the normative and empirical studies of Plato and Aristotle were among the direct ancestors of contemporary political science. Parallel examples are to be found in the intellectual history of China, India and Islam. It seems that at certain stages in the development of great societies questions of legitimacy, power and leadership assume supreme importance; and intense intellectual effort, using the best analytical tools available, is devoted to the study of man as brought to a focus in the study of politics.
In: Peace and conflict: journal of peace psychology ; the journal of the Society for the Study of Peace, Conflict, and Violence, Peace Psychology Division of the American Psychological Association, Band 7, Heft 2, S. 191-192
ISSN: 1532-7949
In: PS: political science & politics, Band 13, Heft 1, S. 80-88
ISSN: 1537-5935
In: The bulletin of the atomic scientists: a magazine of science and public affairs, Band 14, S. 217-219
ISSN: 0096-3402, 0096-5243, 0742-3829
In: Peace economics, peace science and public policy, Band 20, Heft 3, S. 373-376
ISSN: 1554-8597
In: Peace economics, peace science and public policy, Band 18, Heft 3
ISSN: 1554-8597
In: International studies perspectives: a journal of the International Studies Association, Band 7, Heft 3, S. 287-306
ISSN: 1528-3577
World Affairs Online