Comment on "Observational constraints on power-law cosmologies" - art. no.108301

''Power-law cosmologies" are defined by their growth of the cosmological sc ale factor as t(alpha) regardless of the matter content or cosmological epo ch. Constraints from the current age of the universe and from the high reds hift supernovae data require "large" alpha (approximate to 1). We reinforce this with the latest available observations. Such a large alpha is also co nsistent with the right amount of helium and the lowest observed metallicit y in the universe for a model with the baryon entropy ratio approximate to 8.1 x 10(-9). [S0556-2821(99)08620-8].