Bank of Italy and NBER conference. The views expressed here are our own and do not necessarily reflect those of the Bank of Italy, nor those of the National Bureau of Economic Research.NBER working papers are circulated for discussion and comment purposes. They have not been peerreviewed or been subject to the review by the NBER Board of Directors that accompanies official NBER publications.

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The paper investigates the relationship between underground activities and financial deepening. The access to external finance requires entrepreneurs to disclose credible information through formal documentation. This requirement may be impossible to oblige to for many informal producers who lack a proper book-keeping of their operations. For the same reason irregular workers may find difficult to borrow for financing both consumption and housing purchase. Using panel data on Italian regional credit markets we find a strong negative impact of the share of irregular employment on outstanding credit to the private sector. According to our estimates a shift of 1 per cent of the employees from regular activities to irregular ones corresponds to a decline of about 2 percentage points in the volume of business lending and of 0.3 percentage points in outstanding credit to households, both expressed as ratios to GDP. Conversely, the feedback effects from financial deepening to the size of the informal sector are weak and statistically not significant. Through a difference-in-difference approach exploiting the regularisation program for immigrant workers launched in 2002 we also identify a negative effect of the irregular labour on banks' entry decisions in the local credit markets, now defined in terms of provinces.JEL classifications: G21, O17, R23.

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