We use a fully-specified neoclassical model augmented with costly external equity as a laboratory to study the relations between stock returns and equity financing decisions. Simulations show that the model can simultaneously and in many cases quantitatively reproduce: procyclical equity issuance;...

The q-theory implies that investment is a first-order determinant of the cross section of expected returns, and that optimal investment drives the external financing anomalies. Our neoclassical model simultaneously and in many cases quantitatively reproduces: Procyclical equity issuance waves;...