Recent laboratory measurements of positive ion/negative ion recombination coefficients at pressures below 8 torr have indicated that the coefficients increase more rapidly with pressure than expected on the basis of previous higher pressure data. These data, together with previous recombination coefficients obtained in the low pressure limit have been used to redetermine the total effective binary recombination coefficients which are most appropriate to the stratosphere. These new values are almost a factor of two larger than our previous values and are, within error, in agreement with the values derived from in-situ measurements of ion densities and ionization production rates. It is concluded that the new values are accurate to better than ¿50% and can be used with confidence in calculations of stratosphere deionization rates.