The Formation and Evolution of Interorganisational Business Networks in Megaprojects: A Case Study of Chinese Skyscrapers

Table 6

Organisations of first-tier betweenness centrality (top 3) each year.

	2006	2008	2009	2010	2011	2012	2013	2014	2015
All organizations	D2021048	D2021048	D2021048	D2021048	D2021048	C4012083	C4012083	C4012083	C3091077
	C3021044	C3021044	C3011010	D2254159	C4052098	C3091077	D2021048	C3091077	C4012083
		C4024138	D2254117	D2254117	D2254159	D2254159	C3091077	D2021048	D2021048
Design firm	D2021048	D2021048	D2021048	D2021048	D2021048	D2254159	D2021048	D2021048	D2021048
			D2254117	D2254159	D2254159	D2021048	D2252104	D2254159	D2254159
				D2254117	D2254117	D2254117	D2254159	D2252104	D2252104
Contractor	C3021044	C3021044	C3011010	C3011010	C4052098	C4012083	C4012083	C4012083	C3091077
		C4024138	C3021044	C3021044	C3011010	C3091077	C3091077	C3091077	C4012083
			C3011011	C3011011	C3021044	C3021044	C4052098	C3011010	C3021044
Supervisor	—	—	S5022047	S5022047	S5022047	S5022047	S5021045	S5022047	S5022047
					S5031025	S5031025	S5022047	S5021045	S5021045
					S5021045	S5021045	S5031025	S5031025	S5031025

Note. (1) The number of organisations in the first tier may be less than three when only one (or two) organization repeatedly occupied the top list. (2) See Table 7 for the company names of the organisations.