Collateral Damage: The Legacy of the Secret War in Laos

83 Pages Posted: 9 Oct 2020 Last revised: 30 Mar 2021

See all articles by Juan Felipe Riaño

Juan Felipe Riaño

University of British Columbia (UBC)

Felipe Valencia Caicedo

Vancouver School of Economics

Date Written: March 2, 1


As part of its Cold War counterinsurgency operations in Southeast Asia, the U.S. government conducted a “Secret War” in Laos from 1964-1973. This war constituted one of the most intensive bombing campaigns in human history. As a result, Laos is now severely contaminated with UXO (Unexploded Ordnance) and remains one of the poorest countries in the world. In this paper we document the negative long-term impact of conflict on economic development, using highly dis-aggregated and newly available data on bombing campaigns, satellite imagery and development outcomes. We find a negative, significant and economically meaningful impact of bombings on nighttime lights, expenditures and poverty rates. Almost 50 years after the conflict ended, bombed regions are poorer today and are growing at slower rates than unbombed areas. A one standard deviation increase in the total pounds of bombs dropped is associated with a 9.3% fall in GDP per capita. To deal with the potential endogeneity of bombing, we use as instruments the distance to the Vietnamese Ho Chi Minh trail as well as US military airbases outside Laos. Using census data at the village and individual levels, we show the deleterious impact of bombing campaigns in terms of health, education, structural transformation and rural-urban migration.

Keywords: Conflict, Laos, Persistence, Cold War, Counterinsurgency, UXO, Development, Growth, Health, Human Capital, Structural Transformation, Migration

JEL Classification: D74, N10, N15, O10, O53

Suggested Citation

Riaño, Juan Felipe and Valencia Caicedo, Felipe, Collateral Damage: The Legacy of the Secret War in Laos (March 2, 1). Available at SSRN: or

Juan Felipe Riaño

University of British Columbia (UBC) ( email )

2329 West Mall
Vancouver, British Columbia BC V6T 1Z4

Felipe Valencia Caicedo (Contact Author)

Vancouver School of Economics ( email )

997-1873 East Mall
Vancouver, BC V6T 1Z1

HOME PAGE: http://

Do you have a job opening that you would like to promote on SSRN?

Paper statistics

Abstract Views
PlumX Metrics