Abstract: The objective of this study is to measure the efficiency level of the COOPECs in the network in Chad. To do this, we applied the non-parametric Data Envelopment Analysis (DEA) method to a sample of 50 COOPECs observed over four years (2015-2019) to calculate the various efficiency scores. The results of the DEA model show that the COOPECs in network are technically efficient regardless of the returns to scale assumption. The COOPECs in network achieve an average performance of 87.34% using the financial approach and 88.42% using the global approach. The average scores obtained without changing the size of the COOPECs’ activity under the constant returns to scale assumption are: 94.23% for financial efficiency, 37.77% for social efficiency, and 92.66% for overall efficiency. According to the CCR model, the lowest efficiency is 21.12% for financial efficiency, 24.93% for social efficiency and 29.77% for overall efficiency of the COOPECs in network. In the intermediation approach, the scores obtained are relatively low with an average of 38.64%. The COOPECs in our sample have efficient operational and managerial management and therefore control of the savings collection process and transformation of these savings into loans is relatively less good. In view of the results, the COOPECs of the network have low efficiency in social terms, therefore, it seems important that network managers are interested in the massive membership of women.

Key words: Co-operative, Efficiency financial, Efficiency social, DEA method, Chad