 Néstor Kirchner, who belonged to the moderate center-left wing of Peronism (rooted in the leftist Peronist factions of the 1970s), continued Duhalde's measures (even keeping his Minister of Economy, Roberto Lavagna) and added some heterodox economics.Heavy taxes on exports have served to keep local prices of valuable commodities in check, while collecting huge revenues (especially from oil products and agricultural exports like soybeans).The restrictive monetary policy of the 1990s has become aggressively expansive; the Central Bank has injected large amounts of cash into the economy and bought dollars from the free currency market in order to accumulate reserves.