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7* - Agency, Counterfactuals, and Independence

Published online by Cambridge University Press:  20 April 2010

Daniel M. Hausman
Affiliation:
University of Wisconsin, Madison
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Summary

Independence and a Token Version of Agency Theory

Analogous to the conditions in chapter 5 let us define:

AT (Agency theory) a causes b if and only if a and b are distinct, and with respect to some set of (actual) events E, if a had come about as a result of a direct manipulation, then that intervention would be a cause of b.

If one wants to make the circularity less blatant, one can replace the last nine words with “then that intervention would be nomically connected to b,” and all the same results hold. As was the case with ATg, the quantification over a set of events is necessary, because the notion of a direct manipulation is relativized to a set of events.

DHI (Definition of a human intervention) i is a direct human intervention or manipulation that brings about a only (with respect to a set of events E of interest) if and only if (1) i is distinct from every event in E, (2) i is a direct cause of a, (3) the structure of the causal relations between a and its effects is the same when a is caused by i as when there is no intervention, (4) i has no causal connections to any other events in E except those that follow from its being a direct cause of a, and (5) i is a human action.

Type
Chapter
Information
Causal Asymmetries , pp. 151 - 155
Publisher: Cambridge University Press
Print publication year: 1998

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