In a model with multiple agents with different risk aversions facing margin constraints, we show how securities’ required returns are characterized both by their beta and their margins. Negative shocks to fundamentals make margin constraints bind, lowering risk free rates and raising Sharpe...

We propose a unied model of limited market integration, asset-price determination, leveraging, and contagion. Investors and firms are located on a circle, and access to markets involves participation costs that increase with distance. Despite the exante symmetry of investors, their strategies...

We study an overlapping-generations economy in which new agents innovate and introduce new products and firms. Innovation is stochastic. The new firms increase overall productivity, but also steal business from pre-existing firms and act as depreciation shocks for the human capital of existing...

and Cochrane (1999), and is therefore successful at addressing a number of stylized facts about asset prices.

We study a production economy with multiple sectors financed by issuing securities to agents who face capital constraints. Binding capital constraints propagate business cycles, and a reduction of the interest rate can increase the required return of high-haircut assets since it can increase the...

capital is imbalanced between the two markets.

We study information percolation in a stylized over-the-counter market in which a large set of asymmetrically informed investors meet in small groups over time, exchanging information with their counterparties when matched, through for example their bids for an asset. We provide an explicit...

their past trading volumes). Our results are consistent with the thrust of search-based OTC financial market theory.