For 50 years, nuclear advocates have been promising that future costs of reactors will come down. A new report this week from MIT calls on Congress to place a very big bet on that proposition. It recommends that the "implementation of the first mover program of incentives should be accelerated" but "the incentive program should not be extended beyond the first movers (first 7-10 plants) since we believe that nuclear energy should be able to compete on the open market as should other energy options. " The report is only the latest in a series from MIT that grossly underestimates …