. 2018 Jun 15;62(7):796–807. doi: 10.1093/annweh/wxy052

Table 3.

Relative contribution of the different types of link covered by the crosswalk assistant.

Origin system	Target system	Proportion of jobs in a database of occupational histories (31,673 jobs) for which crosswalks provide useful information
		≤10 codes proposed				Direct link to 1 job
		All links combined^b	By type of link (exclusively)^a			All links combined^b	By type of link (exclusively)^a
		All links combined^b	‘Expert’	‘Empirical’	‘Official’	All links combined^b	‘Expert’	‘Empirical’	‘Official’
CCDO-1971	ISCO-1968	85.1%	57.9%	25.6%	1.6%	72.7%	57.9%	14.8%	0.0%
CCDO-1971	NOC-2011	99.0%	66.2%	17.5%	15.2%	81.0%	66.2%	12.0%	2.9%
CCDO-1971	US-SOC-2010	89.6%	59.2%	24.0%	6.4%	70.6%	59.2%	10.6%	0.8%
ISCO-1968	CCDO-1971	84.9%	0%	84.8%	0.1%	24.9%	0%	24.9%	0.0%
ISCO-1968	NOC-2011	95.3%	0%	90.3%	5.0%	58.1%	0%	55.6%	2.4%
ISCO-1968	US-SOC-2010	97.7%	0%	91.8%	5.8%	54.6%	0%	51.0%	3.6%
NOC-2011	CCDO-1971	88.5%	0%	88.1%	0.3%	18.1%	0%	18.0%	0.1%
NOC-2011	ISCO-1968	95.1%	0%	94.1%	1.0%	30.8%	0%	29.3%	1.4%
NOC-2011	US-SOC-2010	99.4%	0%	97.9%	1.5%	58.6%	0%	57.2%	1.4%
US-SOC-2010	CCDO-1971	87.3%	0%	87.0%	0.3%	22.5%	0%	22.3%	0.2%
US-SOC-2010	ISCO-1968	97.3%	0%	94.3%	3.0%	35.8%	0%	34.0%	1.8%
US-SOC-2010	NOC-2011	98.9%	0%	95.4%	3.5%	73.8%	0%	68.0%	5.8%

^aThe category of links was ranked from the most to the less informative. When a link is available for a starting code, links at the lower levels were not sought.

^bThe sum can vary due to rounding.