Stimulating healthy choice in online canteen

In an experiment with low SES workers (n=956) product positioning (healthy products top versus bottom) and lunch order timing (expected to be delivered within 30 minutes versus...本实验以956名低社会经济地位（SES）工人为研究对象，设置了两类实验变量：其一为产品摆放位置（健康食品置顶vs置底），其二为午餐订单配送时效（预计30分钟内送达vs……）