Health insurance purchasing cooperatives were established in the early to m
id-1990s for the purpose of making health insurance more affordable and acc
essible for small employers. Extensive interviews at six cooperatives revea
l that while some cooperatives enrolled large numbers of small employers, m
ost have won only small market shares and a number have struggled for survi
val, not always successfully. They have allowed small employers to offer in
dividual employees choice of health plans, but none has been able to sustai
n lower prices than are available in the conventional market. Among the imp
ortant impediments to their success are limited support from health plans a
nd conflicts over the role of insurance agents.