Electricite de France, the French monopoly provider of electricity, has bee
n testing a number of new policy instruments to avoid disconnection among i
ts low income customers. This paper uses decentralization, a common feature
of social programmes, to identify the impact of Electricite Ade France's e
nergy assistance programmes on the probability of disconnection for househo
lds with difficulties of payment. Naive estimates of programme impact are s
hown to be seriously biased.