@article{Helleringer2005, author = {Helleringer, S. and Kohler, H.-P.}, title= {Social Networks, Risk Perceptions, and Changing Attitudes Towards HIV/AIDS: New Evidence from a Longitudinal Study Using Fixed-Effects Estimation}, year = {2005}, doi = {10.1080/00324720500212230}, journal = {Population Studies}, volume = {59}, number = {3}, pages = {265--282}, }