Akresh I, Frank R (2011) At the intersection of self and other: English language ability and immigrant labor market outcomes. Soc Sci Res 40:1362–1370
Angrist J, Pischke J (2009) Mostly harmless econometrics. Princeton University Press, Princeton
Araújo L, Dinis da Costa P, Flisi S, Soto Calvo E (2015) Languages and employability. European Commission Joint Research Centre science and policy report
Blanche P, Merino B (1989) Self-assessment of foreign language skills: implications for teachers and researchers. Lang Learn 39:313–340
Bleakley H, Chin A (2004) Language skills and earnings: evidence from childhood immigrants. Rev Econ Stat 86:481–496
Bormann S, Ridala S, Toomet O (2019) Language skills in an ethnically segmented labour market: Estonia 1989-2012. Int J Manpow 40:304–327
Card D (1999) The causal effect of education on earnings. In: Ashenfelter O, Card D (eds) Handbook of labor economics, vol 3. Elsevier, Amsterdam, pp 1801–1863
Card D (2001) Estimating the return to schooling: progress on some persistent problems. Econometrica 69:1137–1160
Card D, Lee D (2008) Regression discontinuity inference with specification error. J Econ 142:655–674
Clarke D (2017) PLAUSEXOG: version-15 Stata module to implement Conley et al.'s plausibly exogenous bounds. Persistent link: https://EconPapers.repec.org/RePEc:boc:bocode:s457832
Clarke D, Matta B (2017) Practical considerations for questionable IVs. MPRA Paper No. 79991, University Library of Munich, Germany
Conley T, Hansen C, Rossi P (2012) Plausibly exogenous. Rev Econ Stat 94:260–272
Di Paolo A, Tansel A (2015) Returns to foreign language skills in a developing country: the case of Turkey. J Dev Stud 51:407–421
Di Paolo A, Tansel A (2019) English skills, labour market status and earnings of Turkish women. Economic Research Center (ERC) Working Paper in Economics No. 19/01 (February, 2019). Forthcoming in Empirica, vol. 46
DiNardo J, Pischke J (1997) The returns to computer use revisited: have pencils changed the wage structure too? Q J Econ 112:291–303
Dragemark Oscarson A (2009) Self-assessment of writing in learning English as a foreign language. University of Gothenburg studies in educational sciences No. 277
Dustmann C, van Soest A (2001) Language fluency and earnings: estimation with misclassified language indicators. Rev Econ Stat 83:663–674
Dustmann C, van Soest A (2002) Language and the earnings of immigrants. Ind Labor Relat Rev 55:473–492
EC [European Commission] (2012) Europeans and Their Languages – Special Eurobarometer 386
EC [European Commission] / EACEA / Eurydice (2017) Key data on teaching Languages as School in Europe – 2017 Edition. Eurydice Report. Luxembourg Publications Office of the European Union
Gazzola M, Grin F, Wickström B (2016) A concise bibliography of language economics. In: Gazzola M, Wickström B (eds) The economics of language policy. MIT Press, Cambridge
Ginsburgh V, Prieto Rodriguez J (2011) Returns to foreign languages of native workers in the EU. Ind Labor Relat Rev 64:599–618
Grin F (2001) English as economic value: facts and fallacies. World Englishes 20:65–78
Grin F (2003) Language planning and economics. Curr Issues Lang Plann 4:1–66
Gunderson M, Oreopoulos P (2010) Returns to education in developed countries. In: Brewer D, McEwan P (eds) Economics of education. Elsevier, New York, pp 37–43
Hamilton D, Goldsmith A, Darity W (2008) Measuring the wage costs of limited English: issues with using interviewer versus self-reports in determining Latino wages. Hisp J Behav Sci 30:257–279
Hausman JA (1978) Specification tests in econometrics. Econometrica 46:1251–1271
Imbens G, Wooldridge J (2007) Instrumental variables with treatment effect heterogeneity: Local Average Treatment Effects. What’s New in Econometrics, NBER Summer Institute Method Lectures, No. 5
Janowski A (1992) Polish education: changes and prospects. Oxf Stud Comp Educ 2:41–55
Kachru B (1986) The alchemy of English: the spread, functions, and models of non-native Englishes. Pergamon, Oxford
Komorowska H (2014) Analyzing linguistic landscapes: a diachronic study of multilingualism in Poland. In: Otwinowska A, De Angelis G (eds) Teaching and learning in multilingual contexts: sociolinguistic and educational perspectives. Multilingual Matters, Buffalo, pp 19–31
Lang K, Siniver E (2009) The return to English in a non-English speaking country: Russian immigrants and native Israelis in Israel. The B.E. J Econ Anal Policy 9:Article 50
Liwiński J (2018) The wage premium from foreign language skills. GLO Discussion Paper No. 251. Global Labor Organization, Maastricht
Modiano M (2017) English in a post-Brexit European Union. World Englishes 36:313–327
Montiel Olea J, Pflueger C (2015) A robust test for weak instruments. J Bus Econ Stat 31:358–369
Oreopoulos P (2006) Estimating average and local average treatment effects of education when compulsory schooling laws really matter. Am Econ Rev 96:152–175
Oscarson [Oscarsson], M (1984) Self-assessment of foreign language skills: a survey of research and development work. Council of Europe, Council for Cultural Co-operation, Strasbourg
Pesaran M, Taylor L (1999) Diagnostics for IV regressions. Oxf Bull Econ Stat 61:255–281
Ross S (1998) Self-assessment in second language testing: a meta-analysis and analysis of experiential factors. Lang Test 15:1–20
Seidlhofer B (2010) Lingua franca English: the European context. In: Kirkpatrick A (ed) The Routledge handbook of world Englishes. Routledge, London, pp 355–371
Seidlhofer B (2011) Understanding English as a lingua Franca. Oxford University Press, Oxford
Toomet O (2011) Learn English, not the local language! Ethnic Russians in the Baltic States. Am Econ Rev Pap Proc 101:526–531
van Kippersluis H, Rietveld C (2018) Beyond plausibly exogenous. Econ J 21:316–331
Wang H, Smyth R, Cheng Z (2017) The economic returns to proficiency in English in China. China Econ Rev 43:91–104