Now let's imagine that you were an economist in 1929, trying to forecast future growth for the United States, not knowing that the economy was about to go off a cliff, not knowing that we were about to enter the greatest economic disaster certainly in the 20th century.
تصور کنید که در سال ١٩٢٩ شما یک اقتصاددان هستید که رشد اقتصادی آینده را پیش بینی می‌کنید ونمی‌دانید که به زودی بازار سقوط خواهد کرد و نمی‌دانید جهان در حال وارد شدن به بزرگترین بحران اقتصادی قرن است.