Tax incentives and fertility in Canada: quantum vs tempo effects

Using inter-jurisdictional differences in the implementation of the Family Allowance Program in Canada in the mid-1970s, this paper first shows that Quebec families with two or more children prior to being exposed to the program responded quite strongly to the added incentives in the short run relative to women in other Canadian provinces. Tracking down the cohorts across Censuses, we find that the same group of Quebec families subsequently showed a decrease in fertility relative to the rest of Canada, leaving ultimate family size unaffected. These results are consistent with the program having generated only a timing effect.