Readers are advised to read the article to see details of the variables and their construction. The current file provides brief description of each variable in the data set.
| Variable | Description |
| country | Country Name |
| idn | Country code |
| year | Year |
| dentot | Total Union density |
| unadjcov | Unadjusted Union coverage |
| unemp | OECD standardized unemployment rate |
| dsgini | Deiniger-Squire Gini coefficient |
| p1564 | Total population from 15 to 64 years, in millions |
| rgdpc | Real GDP per capita in constant dollars using the chain index |
| open | Trade openness |
| left | Leftist party strength |
| sifam | Total benefit expenditure relating to Social Insurance and Assimilated Schemes and Family Allowance programs as a percentage of GDP |
| sben | Total social security benefit expenditure as a percentage of GDP |
| unben | Total unemployment benefit as a percentage of GDP |
| lcum | Leftist party strength, cumulative score |
| pold | Total population 65 years and over as a percentage of total population |
| pyoung | Total population under 15 years as percentage of total population |
| pop | Total population, in millions |
| milanofpigini | Milanovic factor income Gini coefficient |
| milanogigini | Milanovic gross income Gini coefficient |
| milanodigini | Milanovic disposable income Gini coefficient |
| apdsgini | Adjusted Deininger Squire Gini coefficient |
| lisdigini | LIS disposable income Gini coefficient |
| lisgigini | LIS gross income Gini coefficient |
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