Research status and trend of PPP in the US and China: visual knowledge mapping analysis

Figures & data

Figure 1. The framework of the relevant research procedures and methodological.

Figure 2. The Number of Publications of PPP from 1991 to 2022 in the US and China.

Table 1. The top 10 active and productive institutions in PPP research.

Rank	US			China
	Institution	NP	C	Institution	NP	C
1	University System of Maryland	35	0.07	Hong Kong Polytechnic University	102	0.35
2	Cornell University	20	0.09	Dalian University of Technology	37	0.08
3	Columbia	12	0.02	Southeast University	35	0.15
4	Harvard University	11	0.09	Tong Ji University	34	0.26
5	Purdue University	10	0	Hong Kong University of Science of Technology	25	0.04
6	Centers For Disease Control Prevention USA	9	0.06	Tsinghua University	24	0.10
7	Georgia Institute of Technology	9	0.01	University of Hong Kong	23	0.06
8	George Mason University	8	0.08	Sichuan University	21	0.04
9	Stanford University	8	0.10	Beijing Jiaotong University	20	0.06
10	University of Washington	8	0	Chongqing University	17	0.06

Table 2. The top 10 active and productive authors in PPP research.

Rank	Author	NP	h-index	AVE	Rank	Author	NP	h-index	AVE
1	Chan, Albert P. C.	88	59	44.05	6	Wang, S.Q.	24	17	63.29
2	Zhang, X.Q.	33	27	47.27	7	Chen, C	23	11	15.65
3	Ke, Y.J.	28	20	64.93	8	Xiong, W.	22	31	20.95
4	Skibniewski, M.J.	25	47	30.28	9	Wang,H.M.	18	8	16.50
5	Yuan, J.F.	25	19	24.52	10	Garvin, M.J.	16	14	27.75

Table 3. The top 10 source journal of PPP research in the US and China.

Rank	Source journals	NP	Co	JIF	Rank	Source journals	NP	Co	JIF
1	Sustainability	65	605	3.473	6	Engineering Construction and Architectural Management	28	153	4.129
2	Journal of Management in Engineering	51	1341	6.212	7	Public Performance Management Review	23	350	3.458
3	Journal of Construction Engineering and Management	42	1190	4.513	9	International Journal of Project Management	24	2097	9.222
4	Transportation Research Record	42	185	1.686	8	Journal of Infrastructure Systems	23	514	3.014
5	Journal of Cleaner Production	30	728	9.444	10	International Journal of Strategic Project Management	18	244	2.310

Figure 3. Visualization map of the keyword co-occurrence network related to PPP research (Occurrences of keyword≥20).

Figure 4. Cluster analysis of documents in the PPP research field.