Foreign-exchange controls, typically accompanied by price controls, give the government the sense that it can have its cake (lax policies) and eat low inflation. But controls lead to a parallel exchange rate, which can be either legal, as in Argentina, or illegal and even unpublishable, as in Venezuela.
外汇管制通常伴随着价格管制，让政府感觉自己可以在低通胀情况下享受到宽松政策的蛋糕。但管制催生了一个平行的双重汇率，这可以是合法的,如阿根廷，也可以是非法或地下的,如委内瑞拉。