We present a continuum economy with risk neutral. agents having hetero
geneous expectations and restricted short sales. A stochastic version
of the model is also formulated and the resulting time series behavior
of the price and volume series under a specific money supply process
derived. The implications of the model are tested in the emerging Turk
ish stock market where institutional arrangements comply with the rest
rictions of the model. The results indicate that, as predicted by the
model, price levels and trading volume are cointegrated. The error cor
rection models are also estimated and found to be significant in most
cases.