@Kate – different research analysts use different definitions, sources of data and algarythms for calculating estimates of future spend. It isn’t unusual for projections for the same thing to be wildly different. While there is some overlap between m-payments and m-commerce, they are not the same (usually). M-payments would include m-ticketing and m-vouchers for example which I personally wouldn’t include in m-commerce if redeemed in store… m-commerce, I consider to be sales of goods and services via a mobile site or mobile app.