Table A1 OLS estimates of labour market...

Table A1

OLS estimates of labour market concentration on skill/competency demand (group 1), TF-IDF measure; controlling for the log of the market average firm employment size

	Skills	Knowledge	Ability	Activities	Styles
log(HHI)	0.0007*	−0.0010***	−0.0002	0.0006	0.0014***
	(0.0004)	(0.0004)	(0.0002)	(0.0004)	(0.0005)
log(avg. no. workers)	0.0007*	0.0003	−0.0000	0.0004	−0.0020***
	(0.0004)	(0.0004)	(0.0002)	(0.0004)	(0.0004)
Year FE	✓	✓	✓	✓	✓
Prov. FE	✓	✓	✓	✓	✓
Ind. FE	✓	✓	✓	✓	✓
ISCO4 FE	✓	✓	✓	✓	✓
MDV	0.099	0.082	0.017	0.094	0.103
mean(HHI*10k)	1,319	1,319	1,319	1,319	1,319
R²	0.133	0.140	0.017	0.124	0.112
N	553,030	553,030	553,030	553,030	553,030

	Skills	Knowledge	Ability	Activities	Styles
log(HHI)	0.0007*	−0.0010***	−0.0002	0.0006	0.0014***
	(0.0004)	(0.0004)	(0.0002)	(0.0004)	(0.0005)
log(avg. no. workers)	0.0007*	0.0003	−0.0000	0.0004	−0.0020***
	(0.0004)	(0.0004)	(0.0002)	(0.0004)	(0.0004)
Year FE	✓	✓	✓	✓	✓
Prov. FE	✓	✓	✓	✓	✓
Ind. FE	✓	✓	✓	✓	✓
ISCO4 FE	✓	✓	✓	✓	✓
MDV	0.099	0.082	0.017	0.094	0.103
mean(HHI*10k)	1,319	1,319	1,319	1,319	1,319
R²	0.133	0.140	0.017	0.124	0.112
N	553,030	553,030	553,030	553,030	553,030

Note(s): Each observation consists in a vacancy. This table reports the OLS regression outputs using as dependent variables the TF-IDF intensity measure of the broader skill classification (group 1) described in section 4. The independent variable is the log of the employment HHI, measured at the industry (2-digit ATECO code), province (NUTS-3), and year level. All the regressions also include occupation (ISCO 4-dig) fixed effects. Robust standard errors in parentheses ***p < 0.01, **p < 0.05, *p < 0.1

Source(s): Authors' calculation on AIDA and Wollybi data in 2015–2018 period

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