H(0), WHY THE DIFFERENCES

An up-to-date review of the present status of the distance scale probl em is given. The local (v0 < 10 000 km s-1) value of the Hubble parame ter is found to be H0 = 83 +/- 6 km s-1 Mpc-1. A global (v0 > 10 000 k m s-1) H0 = 76 +/- 9 km s-1 Mpc-1 is derived. The reasons for some dev iant results recently obtained by others are discussed. The main culpr its appear to be (1) the assumption that SNeIa are good standard candl es with uniform colors, and (2) the belief that the diameters of ScI g alaxies are good yardsticks.