Macroeconomic data suggest that the New Keynesian Phillips curve is quite flat - despite microeconomic evidence implying frequent price adjustments. While real rigidities may help to account for the conflicting evidence, we propose an alternative explanation: if price markup/cost-push shocks are...

Consider an employer who wants her employee to work hard. As is well known from the e.ciency wage literature, the employer must pay the (wealth-constrained) employee a positive rent to provide incentives for exerting unobservable e.ort. Alternatively, the employer could make effort observable by...