One can look at the arrival of New Public Management and the extensive public sector reforms inspired by this theory from many angles. Here we examine the shift from long-term contracting, typical of bureaucracy and traditional enterprises, to short-term contracting, borrowed from private sector governance methods. Shortterm contracting has three principal uses in the governance of the public sector: (a) contracting with service providers after a tendering/bidding process; (b) contracting with the CEOs of the incorporated public enterprises; and (c) contracting with executive agencies about what they should deliver. Theoretical analysis, supported by substantial empirical evidence, suggests that short-term contracting eliminates the extensive post-contractual opportunism connected with long-term contracting, but is vulnerable to pre-contractual opportunism. Short-term contracting is not just another public sector reform fad, but constitutes a new tool for government which increases efficiency when handled with prudence.