Firms	Individuals
$V_{s}^{F}$ Þ filled s position	$V_{u s}^{E}$ Þ empl. $u s$ individual
$V_{s}^{V}$ Þ vacant s position	$V_{u s}^{U}$ Þ unempl. us individual
$V_{u s}^{F}$ Þ filled us position	$V_{s}^{E}$ Þ empl. s individual
$V_{u s}^{V}$ Þ vacant us position	$V_{s}^{U}$ Þ unempl. s individual