The trustees of Social Security and Medicare recently estimated that the retirement trust fund would run out of money earlier than they estimated last year. That estimated stimulated considerable discussion and analysis, much of it centered on how accurate the estimate is likely to be. There was a particularly good analysis from the Center for Retirement Research at Boston College (CRR). The CRR report praises the trustees for acknowledging that a couple of its longstanding assumptions were too optimistic. In the trustees’ latest report, those assumptions finally are changed to make the projections more realistic.The CRR report then points to…