J. E. Anderson and Ö. B. Bodvarsson, Tax evasion on gratuities, Public Finance Review, vol.33, issue.4, pp.466-487, 2005.

O. H. Azar, The social norm of tipping: A review 1, Journal of Applied Social Psychology, vol.37, issue.2, pp.380-402, 2007.

O. H. Azar, Tipping motivations and behavior in the US and Israel, Journal of Applied Social Psychology, vol.40, issue.2, pp.421-457, 2010.

O. H. Azar, Business strategy and the social norm of tipping, Journal of Economic Psychology, vol.32, issue.3, pp.515-525, 2011.

Z. W. Brewster and J. R. Brauer, Tableside justice: Racial differences in retributive reactions to dissatisfaction, Sociology of Race & Ethnicity, vol.3, issue.3, pp.383-397, 2017.

Z. W. Brewster and M. Lynn, Black-White earnings gap among restaurant servers: A replication, extension, and exploration of consumer racial discrimination in tipping, Sociological Inquiry, vol.84, pp.545-569, 2014.

Z. W. Brewster, I. Nowak, and G. R. , Racial Prejudices, Racialized workplaces, and restaurant servers' hyperbolic perceptions of black-white tipping differences, Cornell Hospitality Quarterly, vol.60, issue.2, pp.159-173, 2019.

A. Bryman, Social Research Methods, 2016.

S. M. Clifton, E. Herbers, J. Chen, and D. M. Abrams, The tipping point: A mathematical model for the profit-driven abandonment of restaurant tipping, Chaos: An Interdisciplinary Journal of Nonlinear Science, vol.28, issue.2, 2018.

, Comparative price levels, European Commission, 2019.

. Eurostat, Monthly minimum wages -bi-annual data, National collective, 2018.

S. Fernandez, C. De-boer, and L. Terrier, Restaurant tipping: The rules are not the same everywhere, 2016.

, EuroChrie conference

. Gastrosuisse, Gastgewerbliche Löhne. Retrieved, 2019.

V. George, The Future of the welfare state, European welfare policy: Squaring the welfare circle, pp.1-30, 1996.

V. George and . Taylor-gooby, European welfare policy: Squaring the welfare circle, 1996.

D. Hemenway, Prices & choices: Microeconomic vignettes, 1993.

G. Hofstede, National cultures in four dimensions: A research-based theory of cultural differences among nations. International Studies of Management & Organization, vol.13, pp.46-74, 1983.

. Hrf, Minimilön för lönegrupp 1, 2019.

F. Jacobs, In which countries should you tip and how much?, 2017.

P. B. Kim, B. Nemeschansky, and L. Brandt, An exploratory study of determinants for restaurant servers' actual tip earnings: Individual characteristics and work conditions, Journal of Foodservice Business Research, vol.20, issue.1, pp.15-33, 2017.

M. Lynn, Seven ways to increase servers' tips, Cornell Hotel and Restaurant Administration Quarterly, vol.37, issue.3, pp.24-29, 1996.

M. Lynn, Restaurant tipping and service quality: A tenuous relationship, Cornell Hotel and Restaurant Administration Quarterly, vol.42, issue.1, pp.14-20, 2001.

M. Lynn, Turnover's relationships with sales, tips and service across restaurants in a chain, International Journal of Hospitality Management, vol.21, issue.4, pp.26-35, 2002.

M. Lynn, Tipping in restaurants and Around the Globe: An Interdisciplinary Review, Handbook of Contemporary Behavioral Economics: Foundations and Developments, pp.626-643, 2006.

M. Lynn, Determinants and consequences of female attractiveness and sexiness: Realistic tests with restaurant waitresses, Archives of Sexual Behavior, vol.38, issue.5, pp.737-745, 2009.

M. Lynn, Should U.S. Restaurants abandon tipping? A review of the issues and evidence, Psychosociological Issues in Human Resource Management, vol.5, issue.1, pp.120-159, 2017.

M. Lynn, The effects of tipping on Consumers' satisfaction with restaurants, Journal of Consumer Affairs, vol.52, issue.3, pp.746-755, 2018.

M. Lynn and B. Latané, The psychology of restaurant tipping, Journal of Applied Social Psychology, vol.14, issue.6, pp.549-561, 1984.

M. Lynn and T. Simons, Predictors of Male and Female Servers' Average Tip Earnings, Journal of Applied Social Psychology, vol.30, issue.2, pp.241-252, 2000.

M. Lynn and S. Wang, The indirect effects of tipping policies on patronage intentions through perceived expensiveness,fairness, and quality, Journal of Economic Psychology, vol.39, pp.62-71, 2013.

M. Lynn, G. M. Zinkhan, and J. Harris, Consumer tipping: A cross-country study, Journal of Consumer Research, vol.20, pp.478-485, 1993.

A. Macnaughton and M. R. Veall, Tipping and the McQuatters formula, Public Finance Review, vol.29, issue.2, pp.99-107, 2001.

E. D. Mansfield, The political economy of the itching palm: An analysis of tipping norms. International studies quarterly, vol.60, pp.375-386, 2016.

. Nho-reiseliv, Tipssmell for reiselivet i statsbudsjettet, 2018.

. Nho-reiseliv, Siv Jensen bekrefter arbeidsgivers styringsrett over tips, 2019.

M. Parrett, Beauty and the feast: Examining the effect of beauty on earnings using restaurant tipping data, Journal of Economic Psychology, vol.49, pp.34-46, 2015.

P. R. Popple, Social work practice and social welfare policy in the United States: A History, Regjeringen, 1986.

T. Rotko, L. Oglesby, N. Künzli, and M. J. Jantunen, Population sampling in European air pollution exposure study, EXPOLIS: Comparisons between the cities and representativeness of the samples, Journal of Exposure Science and Environmental Epidemiology, vol.10, issue.4, pp.355-364, 2000.

A. Rutherford, ANOVA and ANCOVA: A GLM approach, 2011.

R. S. Schmidgall and J. Tarras, The high cost of violating tip-reporting laws, Cornell Hotel and Restaurant Administration Quarterly, vol.36, issue.1, pp.40-46, 1995.

O. Shy, Do tips increase workers' income? Management Science, vol.61, pp.2041-2051, 2015.

N. Star, The International Guide to Tipping, 1988.

P. Taylor-gooby, B. Leruth, and H. Chung, After Austerity: Welfare state Transformation Europe after the Great Recession, 2017.

W. J. Wessels, Minimum wages and tipped servers, Economic Inquiry, vol.35, issue.2, pp.334-349, 1997.

J. E. Whaley, S. H. Kim, and Y. K. Kim, Drivers and impact of restaurant tipping behavior, Journal of Foodservice Business Research, vol.22, issue.2, pp.117-131, 2019.