Earth analogs

I spent some of the morning pair-writing (the equivalent of pair-coding) the discussion of Foreman-Mackey's paper on the radius and period distribution of small planets. We have re-analyzed with fewer assumptions than previous studies and got different answers about the rate of Earth analogs, which is a (relatively) unusual example of better statistical methods leading to changed results. Most of the differences between what we find and what has come previously can be attributed to the strength of the assumptions about the period distribution as a function of planet radius; separability as it were.