AN EMPIRICAL-INVESTIGATION OF THE DYNAMICS OF PAC CONTRIBUTIONS

We study the extent to which PACs target the members and chairs of par ticular congressional committees, by estimating the effects of changes in a representative's committee and leadership assignments on changes in the pattern of PAC contributions received by the representative. W e find strong evidence that ties exist between certain types of PACs a nd congressional committees. In addition, the analysis reveals interes ting asymmetries in the propensity of PACs to add or drop members who change their committee assignments.