盖洛普、尼尔森这些如今在全球市场调查行业如雷贯耳的名字,其事业多发端于1929年那场罕见的经济萧条。危机袭来,广告主们削减预算,却要求广告公司改善工作,提高效率,服务更多。调查业由此应运而生,盖洛普们忙着走街串巷,了解消费者的消费心理与行为 Gallup, Nielsen These are now thunderous names in the global market research industry, the cause of its career in the rare 1929 recession. Crisis hit, advertisers cut their budgets, but asked the advertising company to improve its work efficiency, more services. As a result, the investigation industry came into being, Gallup people are busy walking through the streets to understand the consumer psychology and behavior