As these new stores reap the rewards of their size, openness and accessibility and drive smaller stores out of business, they bolster the average productivity of the US retail sector as a whole.

• 这些新商店规模大、开放性高、交通便利，有得天独厚的优势，淘汰了那些小商店，提高了美国整体零售业的平均生产率。