Rapid and sustained economic growth allows the poor opportunities to increase their initial endowments (save to accumulate capital, get an education to increase human capital) and to earn better rewards for supplying their resources to others, typically through the market. Another avenue through which trade can spur economic growth is by increasing the pace of innovation by firms. First, trade liberalization increases the size of the market and the incentives to innovate. Second, to the extent that technical knowhow is embodied in products, trade liberalization makes possible knowledge spill-overs through improved access to imports.