J. Anson, O. Cadot, and M. Olarreaga, Tariff Evasion and Customs Corruption: Does Pre-Shipment Inspection Help?, Contributions to Economic Analysis & Policy, vol.5, issue.1, pp.1600-1600, 2006.
DOI : 10.2202/1538-0645.1600

URL : http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.491.3982

M. Bac and P. K. Bag, Beneficial collusion in corruption control: The case of nonmonetary penalties, Journal of Development Economics, vol.81, issue.2, pp.478-499, 2006.
DOI : 10.1016/j.jdeveco.2005.06.007

J. Bhagwati, On the Undervoicing of Imports, Oxford Bulletin of Economics and Statistics, vol.26, issue.4, pp.389-97, 1964.

P. Bolton and M. Dewatripont, Contract theory, 2005.

D. Wulf and L. , Statistical analysis of under- and overinvoicing of imports, Journal of Development Economics, vol.8, issue.3, pp.303-323, 1981.
DOI : 10.1016/0304-3878(81)90018-3

D. Wulf, L. , and J. Sokol, Customs Modernization Handbook, 2004.
DOI : 10.1596/0-8213-5751-4

R. Fisman and S. Wei, Tax Rates and Tax Evasion: Evidence from ???Missing Imports??? in China, Journal of Political Economy, vol.112, issue.2, pp.471-500, 2004.
DOI : 10.1086/381476

A. Geourjon and B. Laporte, Risk management for targeting customs controls in developing countries: a risky venture for revenue performance?, Public Administration and Development, vol.90, issue.2, pp.105-113, 2005.
DOI : 10.1002/pad.336

B. Hoekman and A. Nicita, Trade Policy, Trade Costs and Developing Country Trade, Policy Research Working Paper, vol.4797, 2008.

N. Johnson, Committing to civil service reform : the performance of preshipment inspection under different institutional regimes, Policy Research Working Paper Series, vol.2594, 2001.
DOI : 10.1596/1813-9450-2594

M. Keen, Changing Customs: Challenges and Strategies for the Reform of Customers Administration, 2003.

F. Khalil, Auditing without Commitment, The RAND Journal of Economics, vol.28, issue.4, pp.629-640, 1997.
DOI : 10.2307/2555779

F. Kofman and J. Lawarree, Collusion in Hierarchical Agency On the optimality of allowing collusion, 629?56, pp.61-383, 1993.

J. Laffont and D. Martimort, The Theory of Incentives : The Principal- Agent Model, 2001.

P. Low, Preshipment Inspection Services, 1995.
DOI : 10.1596/0-8213-3185-X

A. Mishra and T. Anant, Activism, separation of powers and development, Journal of Development Economics, vol.81, issue.2, pp.457-477, 2006.
DOI : 10.1016/j.jdeveco.2005.06.005

D. Njinkeu, J. Wilson, and B. P. Fossa, Expanding Trade within Africa, Policy Research Working Paper, vol.4790, 2008.
DOI : 10.1596/1813-9450-4790

L. Pritchett and G. Sethi, Tariff Rates, Tariff Revenue, and Tariff Reform: Some New Facts, The World Bank Economic Review, vol.8, issue.1, pp.1-16, 1994.
DOI : 10.1093/wber/8.1.1

URL : http://wber.oxfordjournals.org/cgi/content/short/8/1/1

R. Strausz, Delegation of Monitoring in a Principal-Agent Relationship, The Review of Economic Studies, vol.64, issue.3, pp.337-57, 1997.
DOI : 10.2307/2971717

J. Tirole, Hierarchies and Bureaucracies: On the Role of Collusion in Organizations, 181?214. (1992): Collusion and the Theory of Organizationsvol. Sixth World Congress of Advances in Economic Theory, pp.151-206, 1986.

J. S. Wilson, C. L. Mann, and T. Otsuki, Assessing the Benefits of Trade Facilitation: A Global Perspective, The World Economy, issue.6, pp.28-841, 2005.

D. Yang, Can Enforcement Backfire? Crime Displacement in the Context of Customs Reform in the Philippines Integrity for Hire: An Analysis of a Widespread Program for Combating Customs Corruption, 1?14, 2008.