In this paper we prove that there are infinitely many abelian left symmetri
c algebras in dimensions greater than or equal to 6. Equivalently this mean
s that there are, up to affine conjugation, infinitely many simply transiti
ve affine actions of R-k, for k greater than or equal to 6. This is a resul
t which is usually credited to A.T. Vasquez, but for which there is no proo
f in the literature.