This article analyzes the measurement of the capital stock when technological advance is embodied in capital. The source of the problem is that capital is not homogeneous across vintages. Which measure of the capital stock to use is dictated by the question being addressed.

An interbank market lets participants pool the risk arising from the combination of illiquid investments and random withdrawals by depositors. But it also creates the potential for one bank's failure to trigger off avalanches of further failures. We simulate a model of interbank lending to study...

We simulate a model of an interbank market. Each bank faces fluctuations in deposits and a stochastic investment opportunity each period. Invested funds mature with delay. The risk arises of failure due to insufficient liquidity. An interbank market lets participants pool this risk but also...