This brief presents contrasting views on the effects of public infrastructure investment on private sector productivity …. David Alan Aschauer states that the slower rate of productivity growth since the early 1970s - coupled with an aging … responsible for part of the productivity slowdown. In contrast, Douglas Holtz-Eakin dismisses the conventional arguments for a …

accelerated. We find that human capital positively affects output per worker and productivity growth. In particular, in terms of … robust to model specifications and estimation methods. The spillover effect appears to be much stronger before 1994. We …