Sample composition and distribution
| Industry | 2010 | 2011 | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | Total firm-years | % |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Automobiles and parts | 1 | 1 | 1 | 3 | 0.7 | |||||||
| Banks | 3 | 3 | 3 | 2 | 1 | 1 | 1 | 1 | 15 | 3.5 | ||
| Chemicals | 1 | 1 | 1 | 1 | 1 | 1 | 6 | 1.4 | ||||
| Construction and materials | 2 | 3 | 4 | 3 | 3 | 2 | 1 | 1 | 2 | 21 | 4.9 | |
| Education | 1 | 1 | 1 | 2 | 2 | 7 | 1.6 | |||||
| Electronic and electrical equipment | 1 | 1 | 1 | 3 | 0.7 | |||||||
| Financial services (other) | 3 | 5 | 6 | 5 | 6 | 4 | 6 | 5 | 5 | 4 | 49 | 11.4 |
| Food and drug retailers | 1 | 2 | 2 | 5 | 1.2 | |||||||
| Food producers | 1 | 2 | 3 | 2 | 2 | 1 | 2 | 1 | 1 | 1 | 16 | 3.7 |
| Forestry and paper | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 9 | 2.1 | |
| General industrials | 1 | 2 | 3 | 3 | 3 | 2 | 1 | 4 | 4 | 6 | 29 | 6.7 |
| General retailers | 1 | 1 | 1 | 1 | 1 | 1 | 3 | 9 | 2.1 | |||
| Health care equipment and services | 1 | 2 | 3 | 2 | 2 | 3 | 2 | 1 | 1 | 17 | 4.0 | |
| Industrial engineering | 1 | 1 | 2 | 1 | 5 | 1.2 | ||||||
| Industrial metals and mining | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 7 | 1.6 | |||
| Industrial transportation | 1 | 3 | 4 | 5 | 3 | 3 | 2 | 2 | 2 | 1 | 26 | 6.1 |
| Life insurance | 1 | 1 | 1 | 3 | 0.7 | |||||||
| Media | 1 | 1 | 1 | 1 | 1 | 5 | 1.2 | |||||
| Mining | 1 | 1 | 5 | 4 | 4 | 2 | 5 | 11 | 11 | 44 | 10.2 | |
| Nonlife insurance | 1 | 1 | 1 | 3 | 0.7 | |||||||
| Oil and gas producers | 1 | 2 | 2 | 1 | 6 | 1.4 | ||||||
| Pharmaceuticals and biotechnology | 1 | 1 | 1 | 3 | 0.7 | |||||||
| Real estate investment and services | 1 | 1 | 3 | 4 | 3 | 3 | 3 | 18 | 4.2 | |||
| Real estate investment trusts | 1 | 2 | 2 | 2 | 6 | 12 | 12 | 10 | 7 | 7 | 61 | 14.2 |
| Software and computer services | 1 | 2 | 2 | 3 | 3 | 2 | 2 | 1 | 1 | 1 | 18 | 4.2 |
| Support services | 1 | 5 | 5 | 5 | 2 | 2 | 20 | 4.7 | ||||
| Technology hardware and equipment | 1 | 2 | 2 | 1 | 6 | 1.4 | ||||||
| Travel and leisure | 1 | 1 | 2 | 1 | 2 | 1 | 1 | 2 | 2 | 2 | 15 | 3.5 |
| Total firm years | 21 | 32 | 46 | 39 | 46 | 48 | 50 | 48 | 50 | 49 | 429 | 100 |
| % | 4.9 | 7.4 | 10.7 | 9.1 | 10.7 | 11.2 | 11.7 | 11.2 | 11.7 | 11.4 | 100 |
| Industry | 2010 | 2011 | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | Total firm-years | % |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Automobiles and parts | 1 | 1 | 1 | 0.7 | ||||||||
| Banks | 3 | 3 | 3 | 2 | 1 | 1 | 1 | 1 | 3.5 | |||
| Chemicals | 1 | 1 | 1 | 1 | 1 | 1 | 1.4 | |||||
| Construction and materials | 2 | 3 | 4 | 3 | 3 | 2 | 1 | 1 | 2 | 4.9 | ||
| Education | 1 | 1 | 1 | 2 | 2 | 1.6 | ||||||
| Electronic and electrical equipment | 1 | 1 | 1 | 0.7 | ||||||||
| Financial services (other) | 3 | 5 | 6 | 5 | 6 | 4 | 6 | 5 | 5 | 4 | 11.4 | |
| Food and drug retailers | 1 | 2 | 2 | 1.2 | ||||||||
| Food producers | 1 | 2 | 3 | 2 | 2 | 1 | 2 | 1 | 1 | 1 | 3.7 | |
| Forestry and paper | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 2.1 | ||
| General industrials | 1 | 2 | 3 | 3 | 3 | 2 | 1 | 4 | 4 | 6 | 6.7 | |
| General retailers | 1 | 1 | 1 | 1 | 1 | 1 | 3 | 2.1 | ||||
| Health care equipment and services | 1 | 2 | 3 | 2 | 2 | 3 | 2 | 1 | 1 | 4.0 | ||
| Industrial engineering | 1 | 1 | 2 | 1 | 1.2 | |||||||
| Industrial metals and mining | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1.6 | ||||
| Industrial transportation | 1 | 3 | 4 | 5 | 3 | 3 | 2 | 2 | 2 | 1 | 6.1 | |
| Life insurance | 1 | 1 | 1 | 0.7 | ||||||||
| Media | 1 | 1 | 1 | 1 | 1 | 1.2 | ||||||
| Mining | 1 | 1 | 5 | 4 | 4 | 2 | 5 | 11 | 11 | 10.2 | ||
| Nonlife insurance | 1 | 1 | 1 | 0.7 | ||||||||
| Oil and gas producers | 1 | 2 | 2 | 1 | 1.4 | |||||||
| Pharmaceuticals and biotechnology | 1 | 1 | 1 | 0.7 | ||||||||
| Real estate investment and services | 1 | 1 | 3 | 4 | 3 | 3 | 3 | 4.2 | ||||
| Real estate investment trusts | 1 | 2 | 2 | 2 | 6 | 12 | 12 | 10 | 7 | 7 | 14.2 | |
| Software and computer services | 1 | 2 | 2 | 3 | 3 | 2 | 2 | 1 | 1 | 1 | 4.2 | |
| Support services | 1 | 5 | 5 | 5 | 2 | 2 | 4.7 | |||||
| Technology hardware and equipment | 1 | 2 | 2 | 1 | 1.4 | |||||||
| Travel and leisure | 1 | 1 | 2 | 1 | 2 | 1 | 1 | 2 | 2 | 2 | 3.5 | |
| 100 | ||||||||||||
| % | 4.9 | 7.4 | 10.7 | 9.1 | 10.7 | 11.2 | 11.7 | 11.2 | 11.7 | 11.4 | 100 |
Source(s): Author's own work
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