This version of the article has been accepted for publication and undergone full peer review but has not been through the copyediting, typesetting, pagination and proofreading process, which may lead to differences between this version and the publisher's final version AKA Version of Record.

This paper develops a four-sector equilibrium search and matching model with informal sector employment opportunities and educational choice. We show that underground activities reduce educational attainments if informal employment opportunities mainly are available for low-educated workers. A more zealous enforcement policy will in this case improve educational incentives as it reduces the attractiveness of remaining a low-educated worker. However, unemployment also increases. Characterizing the optimal enforcement policies, we find that relatively more audits should be targeted towards the sector employing low-educated workers; elsewise, a too low stock of educated workers is materialized. JEL Classification: H26, I21, J64

While examining the macroeconomic effects of government tax and punishment policies, this paper develops a three-sector general equilibrium model featuring matching frictions and worker-firm wage bargaining. Workers are assumed to differ in ability, and the choice of education is determined endogenously. Job opportunities in an informal sector are available only to workers who choose not to acquire higher education. We find that increased punishment of informal activities increases the number of educated workers and reduces the number of unemployed workers. Considering welfare, we show it is optimal to choose punishment rates so to more than fully counteract the distortion created by the government's inability to tax the informal sector.JEL-codes: H26, I21, J64

This paper examines the e¤ect of taxes on the individuals'choices of educational direction, and thus on the economy's skill composition. A proportional labour tax induces too many workers with high innate ability to choose an educational type associated with high consumption value and low e¤ort. This increases the skill mismatch and aggregate unemployment in the economy. The government can correct for this distortion by use of di¤erentiated tuition fees or tax rates. JEL codes: J64, J68, H21, H24

This version of the article has been accepted for publication and undergone full peer review but has not been through the copyediting, typesetting, pagination and proofreading process, which may lead to differences between this version and the publisher's final version AKA Version of Record.