Tremendous effort has been spent on the construction of reliable efficient frontiers. However, mean-variance efficient portfolios constructed using sample means and covariance often perform poorly out of sample. We prove that, the capital market line is the efficient frontier for the risky...

Languages and cultures are mediums of transmitting information. Their value rests on their ability to lower variable costs in communication. Lower variable cost systems in general entail higher fixed costs. Each culture or language has evolved to adapt to the local environment. As environment...