Non-knowledge-intensive services” corresponds to electricity, gas and water supply, construction, trade, hotels and restaurants. “ Skill intensity” is based on the distribution of average wages across firms where “Low skilled” refers to the first quartile, “Medium skilled” to the second quartile, “Moderately-high skilled” to the third quartile and “High skilled” to the fourth quartile. Standard deviations are first averaged within each group and country, and subsequently averaged across the following countries: Belgium, the Czech Republic, Finland, France, Germany, Italy, the Netherlands, Spain, Sweden, and the United Kingdom. Using weights by firm size category and industry within each country does not qualitatively change the results.