NEP led to uneven economic growth. Agriculture recovered quickly, greater food supplies led to a drop in agricultural prices. Industry recovered much more slowly, therefore industrial prices (low during famines) grew steadily - gap opened up between agricultural and industrial prices - Trotsky nicknamed it the 'scissors crisis'. By 1923 the gap reached a crisis point - rise in industrial prices meant that farmers could not buy industrial goods - coupled with low prices gave farmers no incentive to keep producing large quantities of grain. In Dec 1923 the government had to intervene and subsidise the prices of industrial products - affordable to peasants - now meant there was less money available to improve the economy - so radicals, like Trotsky, thought the NEP was not capable of industrialising the economy