Firm dynamics by age and size classes and the choice of size measure
研究发现，用销售额或就业人数衡量企业规模时，规模与增长、年龄与生存的关系截然不同，这对针对中小企业的公共政策有启示。
Abstract The relationship of firm size and age to its growth and survival differs depending on whether the size is measured by sales or employment. Using a large dataset of Greek firms over the period 1999–2014, we find the following patterns. Controlling for age, there is a strong negative growth–size relationship when measuring size with sales, but a strong positive one when measuring size with employment. Controlling for size, there is a positive monotonic survival–age relationship when measuring size with sales, whereas survival is negatively related with age for young firms when we measure size with employment. Our results indicate that public policies aimed at supporting SMEs should be specialized to the employment scale and the sales scale of enterprises, separately.