Before revision:   We investigate how the seller can use the available data to estimate the matrix that captures the dependence of observable agents' consumption decisions on the prices offered to them.
After revision:  Due to the presence of network externalities, an agent's consumption decision depends not only on the price offered to her, but also on the consumption decisions of (and in turn the prices offered to) her neighbors in the underlying network. We investigate how the seller can use the available data to estimate the matrix that captures the dependence of observable agents' consumption decisions on the prices offered to them.