Identifying genuine underpayment of minimum wages is not straightforward. Some well-known statistical issues affect the measurement of compliance rates, but factors such as processing or behavioural influences amongst respondents can also have an impact. We study the quantitative measurement of non-compliance with the minimum wage, using UK apprentices (who have particularly high non-compliance rates) as a case study. We show that understanding the institutional and behavioural context can be invaluable, as can triangulation of different sources. While the binary nature of compliance makes such problems easier to identify and evaluate, this analysis holds wider lessons for the understanding of the characteristics of large and complex datasets.
GarneroAKampelmannSRycxF. Minimum wage systems and earnings inequalities: Does institutional diversity matter? European Journal of Industrial Relations. 2015; 21(2): 115-130.
2.
OECD. Minimum wages after the crisis: making them pay. Paris: OECD Directorate for Employment, Labour and Social Affairs, May 2015.
KampelmannSGarneroARycxF. Minimum wages in Europe: does the diversity of systems lead to a diversity of outcomes? Brussels: European Trade Union Institute, 2013.
5.
Bureau of Labor Statistics. Characteristics of minimum wage workers, 2016. Washington, D.C.: Bureau of Labor Statistics Report no. 1067, April 2017.
6.
DLNZ. Minimum Wage Review 2010: Officials’ Report. Wellington: Department of Labour, New Zealand, 2010.
7.
NelmsL,NicholsonPWheatleyT. Employees earning below the Federal Minimum Wage: Review of data, characteristics and potential explanatory factors. Canberra: Minimum Wages and Research Branch, Fair Work Australia, 2011.
8.
MetcalfD. Why has the British national minimum wage had little or no impact on employment? Centre for Economic Performance Discussion Paper no. 781, London School of Economics, 2007.
9.
RamMEdwardsPJonesT. Informal Employment, Small Firms and the National Minimum Wage. London: Low Pay Commission, September 2004.
10.
RamMEdwardsPMeardiG. Non-compliance and the National Living Wage: Case Study Evidence from Ethnic Minority and Migrant-Owned Businesses. Presentation to the Low Pay Commission Research Workshop, April 2017.
11.
BEIS. The extent and nature of NMW underpayment in the informal economy. London: Department for Business Enterprise and Skills Research Paper no. 16, 2017.
12.
BelmanDWolfsonP. What does the minimum wage do? Kalamazoo: Upjohn Institute, 2014.
13.
IPSOS-MORI. Non-compliance with the National Minimum Wage. London: Low Pay Commission, February 2012.
14.
GramlichEFlanaganRWachterM. Impact of minimum wages on other wages, employment, and family incomes. Brookings Papers on Economic Activity.1976; 2: 409-461.
15.
AshenfelterOSmithR. Compliance with the Minimum Wage Law. Journal of Political Economy1979; 87(2): 333-50.
16.
KennanJ. The elusive effects of minimum wages. Journal of Economic Literature. 1995; 33(4): 1950-1965.
17.
DickensRMachinSManningA. The effects of minimum wages on employment: Theory and evidence from Britain. Journal of Labor Economics. 1999; 17(1): 1-22.
18.
DickensRManningA. Has the national minimum wage reduced UK wage inequality? Journal of the Royal Statistical Society: Series A (Statistics in Society). 2004; 167(4): 613-626.
19.
CroucherRWhiteG. Enforcing the Minimum Wage: The Experience of Workers and Employers. London: Low Pay Commission, 2004.
20.
WeilD. Public enforcement/private monitoring: Evaluating a new approach to regulating the minimum wage. Industrial & Labor Relations Review. 2005; 58(2): 238-257.
21.
le RouxSLucchinoPWilkinsonD. An investigation into the extent of non-compliance with the national minimum wage. London: Low Pay Commission, London, 2013.
22.
GarneroAKampelmannSRycxF. “Sharp Teeth or Empty Mouths? European Institutional Diversity and the Sector-Level Minimum Wage Bite”. British Journal of Industrial Relations. 2015. 53(4): 760-788. doi: 10.1111/bjir.12104.
23.
YeLGindlingTHLiS. Compliance with legal minimum wages and overtime pay regulations in China. IZA Journal of Labor & Development. 2015; 4(1): 1-35.
24.
StroblEWalshF. Minimum Wages and Compliance: The Case of Trinidad and Tobago. Economic Development and Cultural Change. 2003; 51(2): 427-450.
25.
YamadaH. Non-compliance with the Minimum Wage Law when Completely New Minimum Wage Laws Are Established: The Case of South Africa. African Development Review. 2012; 24(1): 41-51.
26.
BhoratHKanburRStanwixB. Minimum Wages in Sub-Saharan Africa: A Primer. IZA Discussion Papers no 9204. 2015.
27.
BasuAKChauNHKanburR. Turning a Blind Eye: Costly Enforcement, Credible Commitment and Minimum Wage Laws. The Economic Journal. 2010; 120(543): 244-269.
28.
RaniUBelserPOelzMRanjbarS. Minimum wage coverage and compliance in developing countries. International Labour Review. 2013; 152(3-4): 381-410.
29.
RandolphGPankninK, eds. Global Wage Debates: Politics or economics? JustJobsNetwork, September 2015.
30.
BhoratHKanburRMayetN. A Note on Measuring the Depth of Minimum Wage Violation. Labour. 2013; 27(2): 192-197.
31.
HamA. Minimum wage violations in a dual labor market with multiple floors. Available at SSRN 2557635. 2015.
LPC. Non-compliance and enforcement of the National Minimum Wage. London: Low Pay Commission, 2017.
34.
GriffithsCOrmerodCRitchieF. Measuring low pay: Measures and precision. Newport: Office for National Statistics, 2007.
35.
OrmerodCRitchieF. Issues in the Measurement of Low Pay, Economic and Labour Market Review. 2007; 1(6): 37-45.
36.
DinkelmanTRanchhodVHofmeyrC. Enforcement and compliance: the case of minimum wages and mandatory contracts for domestic workers. Econ 3 × 3. 2914.
37.
MiltonJ. New methodology for low pay estimates. Newport: Office for National Statistics, 2004.
38.
FrySRitchieF. Behavioural aspects of the National Minimum Wage. London: Low Pay Commission, 2013.
39.
RitchieFWhittardDDawsonC. Understanding official data sources. London: Low Pay Commission, 2014.
40.
DrewHRitchieFVeliziotisM. The measurement of apprentice pay: final report. London: Low Pay Commission, 2015.
41.
GreenDJacowitzKKahnemanDMcFaddenD. Referendum contingent valuation, anchoring, and willingness to pay for public goods. Resource and Energy Economics. 1998; 20: 85-116.
42.
KahnemannD. Thinking, Fast and Slow. London: Penguin Books, 2012.
43.
DrewHRitchieFVeliziotisM. The measurement of apprentice pay; interim report. London: Low Pay Commission, 2015.
44.
GittlemanMPierceB. Pay for Performance and Compensation Inequality: Evidence from the ECEC. ILR Review. 2014; 68: 28-52.
45.
BhattE. The invisibility of home-based work: the case of piece rate workers in India. In: Invisible hands: women in home-based production (Women and the Household in Asia Vol. 1), ed. A. Menefee Singh and A. Kelles-Viitanen. New Delhi, India, Sage Publications. 1987, p. 29-33.
46.
OberskiDLKirchnerAEckmanSKreuterF. Evaluating the quality of survey and administrative data with generalized multitrait-multimethod models. Eprint arXiv:1508.05502. 2015.
47.
Statistics New Zealand. Guide to Interpreting the LEED Data. missinghttp://www.stats.govt.nz/ browse_for_stats/income-and-work/employment_and_unemployment/guide-interpreting-the-leed-data.aspx. Accessed 01.02.2017. Wellington: Statistics New Zealand. 2017.
48.
GarneroA. The dog that barks doesn’t bite: coverage and compliance in sectoral minimum wages in Italy. IZA Discussion Paper no 10511, January 2017.
49.
RitchieFVeliziotisMDrewHWhittardD. Measuring non-compliance with minimum wages. Working Paper. University of the West of England, Bristol, UK, 2017.
50.
Goraus-TanskaKLewandowskiP. Minimum Wage Violation in Central and Eastern Europe. IZA Discussion Paper No. 10098. 2016.
51.
HigtonJ. Apprenticeship pay survey 2012: research findings. London: Department for Business Industry and Skills Research Paper no 121. 2013.
52.
HigtonJKaur-BallaganKNavin ShahJMedienK. Apprentice Pay Survey 2011. London: Department for Business Industry and Skills Research Paper no 64. 2012.
53.
WinterbothamMDaviesBMurphyLHuntley HewittJTweddleM. Apprentice Pay Survey 2014. London: Department for Business Industry and Skills Research Paper no 207. 2014.
54.
KnightJ. Data sources and concepts explained. London: Low Pay Commission, 2010.
