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, Trade union density (share of employees) from Bain and Price (1980) for the earlier period; OECD database from the more recent years

?. War, F. Battle-deaths, and W. Sarkees, Correlates of War dataset, 2010.

, dataset and relative to the period 1970-2010 where at least one country among those in our dataset was actively involved. We list the year and name of the war, followed by the countries involved with number of battle deaths in parenthesis, Here we report all the wars' episodes collected from Sarkees and Wayman, 2010.

, ? 1894-1895 I Sino-Japanese: Japan (400)

, ? 1898 Spanish American: Spain, issue.775

, US (2,910)

, ? 1900 Boxer Rebellion: Japan (622)

. France, , vol.24

, US (21)

, ? 1904-1905 Russo-Japanese: Japan, vol.80

, ? 1909-1910 II Spanish-Moroccan: Spain, p.0

, ? 1911-1912 Italian-Turkish: Italy, p.0

, ? 1914-1918 World War I: Austria, vol.000, p.200

. Belgium, , vol.13

. France, , vol.000, p.385

. Germany, , vol.770, p.773

. Italy, , vol.650, p.0

. Japan, , vol.300

. Portugal, , vol.222

, ? 1918-1920 Estonian Liberation: Finland (150)

, ? 1931-1933 II Sino-Japanese: Japan, p.0

, ? 1935-1936 Conquest of Ethiopia: Italy, p.0

, ? 1937-1941 III Sino-Japanese: Japan, vol.270

, ? 1939-1945 World War II: Australia, vol.33

. Belgium, , vol.600

. Brazil, , p.0

, Canada, vol.992, issue.41

. Finland, , vol.65, p.0

. France, , vol.214

. Japan, , vol.000, p.740

. Germany, , vol.000, p.500

. Italy, , vol.236

. Netherlands, , vol.900

, New Zealand, vol.12

. Norway, , p.0

, ? 1939-1940 Russo-Finnish: Finland, vol.24

. Belgium,

. Canada, , vol.309

. France, , vol.288

. Netherlands,

, UK (710)

, UK (22)

. Spain,

, ? 1965-1973 Vietnam War: Australia, vol.494

, UK (255)

, ? 1991 Gulf War: Canada (0)

. France,

. Italy,

, US (376)

, War for Kosovo: France (0), 1999.

. Germany,

. Italy,

. Netherlands,

, UK (0)

. Canada,

. France,

, UK (0); US (2)

, V-Dem Dataset, vol.9, 1948.

. Australia, , 1963.

. Austria, , 1924.

. Belgium, , 1960.

. Brazil, , 1988.

. Canada, , 1961.

. Denmark, , 1916.

. Finland, , 1907.

. France, , 1945.

. Germany, , 1925.

. Italy, , 1946.

. Japan, , 1953.

. Norway, , 1914.

. Spain, , 1932.

. Sweden, , 1922.

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E. Rubolino and D. Waldenström, Trends and gradients in top tax elasticities: Cross-country evidence, International Tax and Public Finance, vol.26, issue.3, pp.457-485, 2019.

M. R. Sarkees and F. W. Wayman, Resort to War: A Data Guide to Inter-State, Extra-State, Intra-state and Non-State Wars, pp.1816-2007, 2010.

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, The Maddison-Project, 2013.

D. The-polyarchy,

T. Vanhanen, Political Competition, 2015.

V. Dataset, , vol.9