@unpublished{bremond:hal-02469630, TITLE = {{Does OPEC still exist as a cartel ? An empirical investigation}}, AUTHOR = {Br{\'e}mond, Vincent and Hache, Emmanuel and Mignon, Valerie}, URL = {https://ifp.hal.science/hal-02469630}, NOTE = {working paper or preprint}, YEAR = {2011}, MONTH = Mar, PDF = {https://ifp.hal.science/hal-02469630/file/ECO78_BREMOND_HACHE_MIGNON_OPEC.pdf}, HAL_ID = {hal-02469630}, HAL_VERSION = {v1}, }