Citation analysis for Working Papers / Rice University, Department of Economics

Working Papers / Rice University, Department of Economics

0.33

Impact Factor

0.33

5-Years IF

5-Years H index

[Raw data] [50 most cited papers] [50 most relevant papers] [cites used to compute IF] [Recent citations ][Frequent citing series ]
[more data in EconPapers] [trace new citations] [Missing citations? Add them now] [Incorrect content? Let us know]

Main indicators

Raw data

	IF	AIF	IF5	DOC	CDO	CCU	CIF	CIT	D2Y	C2Y	D5Y	C5Y	%SC	CiY	II	AII
1990		0.1			0				0		0		(%)			0.06
1991		0.09			0				0		0		(%)			0.04
1992		0.1			0				0		0		(%)			0.05
1993		0.13			0				0		0		(%)			0.06
1994		0.14			0				0		0		(%)			0.06
1995		0.17			0				0		0		(%)			0.11
1996		0.22			0				0		0		(%)			0.1
1997		0.22			0				0		0		(%)			0.09
1998		0.24			0				0		0		(%)			0.13
1999		0.3			0				0		0		(%)			0.16
2000		0.37		7	7	1	0.14	27	0		0		2 (7.4%)			0.14
2001	0.43	0.37	0.43	10	17	6	0.35	24	7	3	7	3	7 (29.2%)	3	0.3	0.17
2002	0.18	0.37	0.18	11	28	4	0.14	144	17	3	17	3	6 (4.2%)	1	0.09	0.18
2003	0.62	0.4	0.46	13	41	18	0.44	39	21	13	28	13	5 (12.8%)	3	0.23	0.19
2004	0.63	0.41	0.41	11	52	19	0.37	18	24	15	41	17	2 (11.1%)	2	0.18	0.18
2005	0.29	0.43	0.46	10	62	30	0.48	19	24	7	52	24	4 (21.1%)	6	0.6	0.21
2006	0.14	0.44	0.25		62	15	0.24		21	3	55	14	(%)			0.19
2007	0.4	0.37	0.31		62	14	0.23		10	4	45	14	(%)			0.17
2008		0.39	0.15		62	18	0.29		0		34	5	(%)			0.17
2009		0.36	0.14		62	18	0.29		0		21	3	(%)			0.17
2010		0.34	0.3		62	15	0.24		0		10	3	(%)			0.15
2011		0.41			62	15	0.24		0		0		(%)			0.2
2012		0.45		4	66	26	0.39	11	0		0		(%)	1	0.25	0.21
2013	0.5	0.5	0.5	2	68	24	0.35	1	4	2	4	2	(%)			0.2
2014	0.17	0.55	0.17	27	95	17	0.18	25	6	1	6	1	(%)	5	0.19	0.25
2015	0.31	0.57	0.36	15	110	26	0.24	5	29	9	33	12	(%)			0.26
2016	0.33	0.66	0.33	4	114	35	0.31		42	14	48	16	(%)			0.34

IF:	Impact Factor: C2Y / D2Y
AIF:	Average Impact Factor for series in RePEc in year y
IF5:	Impact Factor: C5Y / D5Y
DOC:	Number of documents published in year y
CDO:	Cumulative number of documents published until year y
CCU:	Cumulative number of citations to papers published until year y
CIF:	Cumulative impact factor
CIT:	Number of citations to papers published in year y
D2Y:	Number of articles published in y-1 plus y-2
C2Y:	Cites in y to articles published in y-1 plus y-2
D5Y:	Number of articles published in y-1 until y-5
C5Y:	Cites in y to articles published in y-1 until y-5
%SC:	Percentage of selft citations in y to articles published in y-1 plus y-2
CiY:	Cites in year y to documents published in year y
II:	Immediacy Index: CiY / Documents.
AII:	Average Immediacy Index for series in RePEc in year y

50 most cited documents in this series:

#	Year	Title	Cited
1	2002	Nonlinear IV Unit Root Tests in Panels with Cross-Sectional Dependency. (2002). Chang, Yoosoon. In: Working Papers. RePEc:ecl:riceco:2000-08. Full description at Econpapers \|\| Download paper	127
2	2000	Scheduling with Opting Out: Improving upon Random Priority. (2000). Moulin, Herve ; cres, herve. In: Working Papers. RePEc:ecl:riceco:2000-03. Full description at Econpapers \|\| Download paper	19
3	2003	Weak Unit Roots. (2003). Park, Joon. In: Working Papers. RePEc:ecl:riceco:2003-17. Full description at Econpapers \|\| Download paper	14
4	2001	Fair Queuing and Other Probabilistic Allocation Methods. (2001). Moulin, Herve ; Stong, Richard. In: Working Papers. RePEc:ecl:riceco:2000-09. Full description at Econpapers \|\| Download paper	11
5	2003	Electricity Demand Analysis Using Cointegration and Error-Correction Models with Time Varying Parameters: The Mexican Case. (2003). Chang, Yoosoon ; Martinez-Chombo, Eduardo. In: Working Papers. RePEc:ecl:riceco:2003-08. Full description at Econpapers \|\| Download paper	10
6	2014	Employment Impacts of Upstream Oil and Gas Investment in the United States. (2014). Medlock, Kenneth ; Hartley, Peter ; Agerton, Mark ; Temzelidea, Ted . In: Working Papers. RePEc:ecl:riceco:14-004. Full description at Econpapers \|\| Download paper	9
7	2002	Bootstrap Unit Root Tests in Panels with Cross-Sectional Dependency. (2002). Chang, Yoosoon. In: Working Papers. RePEc:ecl:riceco:2000-01. Full description at Econpapers \|\| Download paper	8
8	2012	Aligning Learning Incentives of Students and Teachers: Results from a Social Experiment in Mexican High Schools. (2012). Parker, Susan ; Behrman, Jere ; Wolpin, Kenneth I ; Todd, Petra E. In: Working Papers. RePEc:ecl:riceco:14-019. Full description at Econpapers \|\| Download paper	7
9	2002	Credit Cycles Redux. (2002). Ripoll, Marla ; Cordoba, Juan. In: Working Papers. RePEc:ecl:riceco:2002-07. Full description at Econpapers \|\| Download paper	7
10	2014	Energy Sector Innovation and Growth. (2014). Medlock, Kenneth ; Hartley, Peter ; Zhang, Xinya ; Temzelides, Ted . In: Working Papers. RePEc:ecl:riceco:14-009. Full description at Econpapers \|\| Download paper	7
11	2005	Unit Root Tests for Panels in the Presence of Short-run and Long-run Dependencies: Nonlinear IV Approach with Fixed N and Large T. (2005). Song, Wonho ; Chang, Yoosoon. In: Working Papers. RePEc:ecl:riceco:2002-06. Full description at Econpapers \|\| Download paper	6
12	2002	Bootstrapping Cointegrating Regressions. (2002). Park, Joon ; Chang, Yoosoon ; Song, Kevin. In: Working Papers. RePEc:ecl:riceco:2002-04. Full description at Econpapers \|\| Download paper	6
13	2004	Strategy-Proofness and Efficiency Are Incompatible in Production Economies. (2004). Leroux, Jistin. In: Working Papers. RePEc:ecl:riceco:2004-07. Full description at Econpapers \|\| Download paper	5
14	2001	Bootstrapping Unit Root Tests with Covariates. (2001). Song, Wonho ; Sickles, Robin ; Chang, Yoosoon. In: Working Papers. RePEc:ecl:riceco:2001-07. Full description at Econpapers \|\| Download paper	5
15	2004	Bargaining among Groups: An Axiomatic Viewpoint. (2004). Moulin, Herve ; Chae, Suchan . In: Working Papers. RePEc:ecl:riceco:2004-01. Full description at Econpapers \|\| Download paper	5
16	2005	Strategyproof Profit Sharing in Partnerships: Improving upon Autarky. (2005). Leroux, Justin. In: Working Papers. RePEc:ecl:riceco:2005-05. Full description at Econpapers \|\| Download paper	5
17	2003	Nonlinear IV Panel Unit Root Tests. (2003). Chang, Yoosoon. In: Working Papers. RePEc:ecl:riceco:2003-06. Full description at Econpapers \|\| Download paper	4
18	2001	Axiomatic Cost and Surplis-Sharing. (2001). Moulin, Herve. In: Working Papers. RePEc:ecl:riceco:2001-06. Full description at Econpapers \|\| Download paper	4
19	2014	An Anatomy of U.S. Personal Bankruptcy under Chapter 13. (2014). Sarte, Pierre Daniel ; Kosar, Gizem ; Eraslan, HÃÂ¼lya ; Li, Weli . In: Working Papers. RePEc:ecl:riceco:14-030. Full description at Econpapers \|\| Download paper	4
20	2005	Strategyproof Profit Sharing: A Two-Agent Characterization. (2005). Leroux, Justin. In: Working Papers. RePEc:ecl:riceco:2005-04. Full description at Econpapers \|\| Download paper	4
21	2003	Why Does It Matter That Beliefs and Valuations Be Correctly Represented?. (2003). Karni, Edi ; Grant, Simon. In: Working Papers. RePEc:ecl:riceco:2003-02. Full description at Econpapers \|\| Download paper	4
22	2004	On Scheduling Fees to Prevent Merging, Splitting and Transferring of Jobs. (2004). Moulin, Herve. In: Working Papers. RePEc:ecl:riceco:2004-04. Full description at Econpapers \|\| Download paper	4
23	2000	Population Principles with Number-Dependent Critical Levels. (2000). Donaldson, David ; Bossert, Walter ; Blackorby, Charles. In: Working Papers. RePEc:ecl:riceco:2000-06. Full description at Econpapers \|\| Download paper	3
24	2003	Strong Approximations for Nonlinear Transformations of Integrated Time Series. (2003). Park, Joon. In: Working Papers. RePEc:ecl:riceco:2003-18. Full description at Econpapers \|\| Download paper	3
25	2012	Renewable Technology Adoption and the Macroeconomy. (2012). Adao, Bernardino ; Temzelides, Ted ; Narajabad, Borghan . In: Working Papers. RePEc:ecl:riceco:14-007. Full description at Econpapers \|\| Download paper	2
26	2003	Limitation of Efficiency: Strategy-Proofness and Single-Peaked Preferences with Many Commodities. (2003). Sasaki, Hiroo . In: Working Papers. RePEc:ecl:riceco:2003-01. Full description at Econpapers \|\| Download paper	2
27	2015	Dynamic Agenda Setting. (2015). Eraslan, HÃÂ¼lya ; Chen, Ying . In: Working Papers. RePEc:ecl:riceco:15-002. Full description at Econpapers \|\| Download paper	2
28	2000	Core Rationalizability in Two-Agent Exchange Economies. (2000). Sprumont, Yves ; Bossert, Walter. In: Working Papers. RePEc:ecl:riceco:2000-07. Full description at Econpapers \|\| Download paper	2
29	2002	Responsibility and Cross-Subsidization in Cost Sharing. (2002). Sprumont, Yves ; Moulin, Herve. In: Working Papers. RePEc:ecl:riceco:2002-05. Full description at Econpapers \|\| Download paper	2
30	2004	Increasing Uncertainty: A Definition. (2004). Quiggin, John ; Grant, Simon ; Quiggan, John. In: Working Papers. RePEc:ecl:riceco:2002-11. Full description at Econpapers \|\| Download paper	2
31	2002	Choice under Uncertainty with the Best and Worst in Mind: Neo-additive Capacities. (2002). Grant, Simon ; Eichberger, JÃÂ¼rgen ; Chateauneuf, Alain. In: Working Papers. RePEc:ecl:riceco:2002-10. Full description at Econpapers \|\| Download paper	2
32	2001	Balanced City Growth and Zipfs Law. (2001). Cordoba, Juan. In: Working Papers. RePEc:ecl:riceco:2002-03. Full description at Econpapers \|\| Download paper	2
33	2003	Nonstationary Nonlinearity: An Outlook for New Opportunities. (2003). Park, Joon. In: Working Papers. RePEc:ecl:riceco:2003-05. Full description at Econpapers \|\| Download paper	2
34	2000	Commons with Increasing Marginal Costs: Random Priority versus Average Cost. (2000). Moulin, Herve ; cres, herve. In: Working Papers. RePEc:ecl:riceco:2000-04. Full description at Econpapers \|\| Download paper	2
35	2015	Efficiency of Flexible Budgetary Institutions. (2015). Zapal, Jan ; Eraslan, HÃÂ¼lya ; Bowen, T. Renee ; Chen, Ying . In: Working Papers. RePEc:ecl:riceco:15-003. Full description at Econpapers \|\| Download paper	2
36	2005	The Spatial Analysis of Time Series. (2005). Park, Joon. In: Working Papers. RePEc:ecl:riceco:2005-07. Full description at Econpapers \|\| Download paper	1
37	2014	Structural Analysis of Nonlinear Pricing. (2014). Luo, Yao ; Vuong, Quang ; Perrigne, Isabelle . In: Working Papers. RePEc:ecl:riceco:14-003. Full description at Econpapers \|\| Download paper	1
38	2003	On Demand Responsiveness in Additive Cost Sharing. (2003). Sprumont, Yves ; Moulin, Herve. In: Working Papers. RePEc:ecl:riceco:2003-10. Full description at Econpapers \|\| Download paper	1
39	2005	Iterative Maximum Likelihood Estimation of Cointegrating Vectors. (2005). Park, Joon ; Kim, In-Moo. In: Working Papers. RePEc:ecl:riceco:2005-02. Full description at Econpapers \|\| Download paper	1
40	2001	The Role of Environmental Factors in Growth Accounting: A Nonparametric Analysis. (2001). Sickles, Robin ; Jeon, Byung M.. In: Working Papers. RePEc:ecl:riceco:2001-08. Full description at Econpapers \|\| Download paper	1
41	2004	On Demand Responsiveness in Additive Cost Sharing. (2004). Sprumont, Yves ; Moulin, Herve. In: Working Papers. RePEc:ecl:riceco:2004-03. Full description at Econpapers \|\| Download paper	1
42	2005	Extracting a Common Stochastic Trend: Theories with Some Applications. (2005). Park, Joon ; Miller, J. ; Chang, Yoosoon. In: Working Papers. RePEc:ecl:riceco:2005-06. Full description at Econpapers \|\| Download paper	1
43	2012	Estimating a Coordination Game in the Classroom. (2012). Todd, Petra E ; Wolpin, Kenneth I. In: Working Papers. RePEc:ecl:riceco:14-017. Full description at Econpapers \|\| Download paper	1
44	2012	Robust Optimal Taxation and Environmental Externalities. (2012). Li, Xin ; Temzelides, Ted ; Narajabad, Borghan . In: Working Papers. RePEc:ecl:riceco:14-006. Full description at Econpapers \|\| Download paper	1
45	2014	Efficiency of Flexible Budgetary Institutions. (2014). Zapal, Jan ; Eraslan, HÃÂ¼lya ; Bowen, T. Renee ; Chen, Ying . In: Working Papers. RePEc:ecl:riceco:14-031. Full description at Econpapers \|\| Download paper	1
46	2014	The Home Selling Problem: Theory and Evidence. (2014). Merlo, Antonio ; Rust, John ; Ortalo-Magne, Francois . In: Working Papers. RePEc:ecl:riceco:14-016. Full description at Econpapers \|\| Download paper	1
47			1
48	2005	Split-Proof Probabilistic Scheduling. (2005). Moulin, Herve. In: Working Papers. RePEc:ecl:riceco:2004-06. Full description at Econpapers \|\| Download paper	1
49	2013	Local Employment Impact from Competing Energy Sources: Shale Gas versus Wind Generation in Texas. (2013). Medlock, Kenneth ; Hartley, Peter ; Zhang, Xinya ; Temzelides, Ted . In: Working Papers. RePEc:ecl:riceco:14-005. Full description at Econpapers \|\| Download paper	1
50	2000	Equitable Insurance Premium Schemes. (2000). Fleurbaey, Marc ; Bossert, Walter. In: Working Papers. RePEc:ecl:riceco:2000-05. Full description at Econpapers \|\| Download paper	1

50 most relevant documents in this series (papers most cited in the last two years)

#	Year	Title	Cited
1	2002	Nonlinear IV Unit Root Tests in Panels with Cross-Sectional Dependency. (2002). Chang, Yoosoon. In: Working Papers. RePEc:ecl:riceco:2000-08. Full description at Econpapers \|\| Download paper	28
2	2014	Employment Impacts of Upstream Oil and Gas Investment in the United States. (2014). Medlock, Kenneth ; Hartley, Peter ; Agerton, Mark ; Temzelidea, Ted . In: Working Papers. RePEc:ecl:riceco:14-004. Full description at Econpapers \|\| Download paper	9
3	2002	Bootstrap Unit Root Tests in Panels with Cross-Sectional Dependency. (2002). Chang, Yoosoon. In: Working Papers. RePEc:ecl:riceco:2000-01. Full description at Econpapers \|\| Download paper	4
4	2012	Aligning Learning Incentives of Students and Teachers: Results from a Social Experiment in Mexican High Schools. (2012). Parker, Susan ; Behrman, Jere ; Wolpin, Kenneth I ; Todd, Petra E. In: Working Papers. RePEc:ecl:riceco:14-019. Full description at Econpapers \|\| Download paper	4
5	2014	An Anatomy of U.S. Personal Bankruptcy under Chapter 13. (2014). Sarte, Pierre Daniel ; Kosar, Gizem ; Eraslan, HÃÂ¼lya ; Li, Weli . In: Working Papers. RePEc:ecl:riceco:14-030. Full description at Econpapers \|\| Download paper	4
6	2003	Electricity Demand Analysis Using Cointegration and Error-Correction Models with Time Varying Parameters: The Mexican Case. (2003). Chang, Yoosoon ; Martinez-Chombo, Eduardo. In: Working Papers. RePEc:ecl:riceco:2003-08. Full description at Econpapers \|\| Download paper	3
7	2014	Energy Sector Innovation and Growth. (2014). Medlock, Kenneth ; Hartley, Peter ; Zhang, Xinya ; Temzelides, Ted . In: Working Papers. RePEc:ecl:riceco:14-009. Full description at Econpapers \|\| Download paper	3
8	2003	Nonlinear IV Panel Unit Root Tests. (2003). Chang, Yoosoon. In: Working Papers. RePEc:ecl:riceco:2003-06. Full description at Econpapers \|\| Download paper	3
9	2012	Renewable Technology Adoption and the Macroeconomy. (2012). Adao, Bernardino ; Temzelides, Ted ; Narajabad, Borghan . In: Working Papers. RePEc:ecl:riceco:14-007. Full description at Econpapers \|\| Download paper	2
10	2000	Scheduling with Opting Out: Improving upon Random Priority. (2000). Moulin, Herve ; cres, herve. In: Working Papers. RePEc:ecl:riceco:2000-03. Full description at Econpapers \|\| Download paper	2
11	2015	Efficiency of Flexible Budgetary Institutions. (2015). Zapal, Jan ; Eraslan, HÃÂ¼lya ; Bowen, T. Renee ; Chen, Ying . In: Working Papers. RePEc:ecl:riceco:15-003. Full description at Econpapers \|\| Download paper	2
12	2015	Dynamic Agenda Setting. (2015). Eraslan, HÃÂ¼lya ; Chen, Ying . In: Working Papers. RePEc:ecl:riceco:15-002. Full description at Econpapers \|\| Download paper	2

Citing documents used to compute impact factor 14:

Year	Title
2016	Separating state dependence, experience, and heterogeneity in a model of youth crime and education. (2016). Rivers, David ; Navarro, Salvador ; Mancino, Maria Antonella . In: Economics of Education Review. RePEc:eee:ecoedu:v:54:y:2016:i:c:p:274-305. Full description at Econpapers \|\| Download paper
2016	The Political Economy of Debt and Entitlements. (2016). Lizzeri, Alessandro ; Bouton, Laurent ; Persico, Nicola . In: CEPR Discussion Papers. RePEc:cpr:ceprdp:11459. Full description at Econpapers \|\| Download paper
2016	Political turnover and the accumulation of democratic capital. (2016). Karakas, Leyla D. In: European Journal of Political Economy. RePEc:eee:poleco:v:44:y:2016:i:c:p:195-213. Full description at Econpapers \|\| Download paper
2016	The Effects of Higher Re-election Hurdles and Costs of Policy Change on Political Polarization. (2016). Gersbach, Hans ; Tejada, Oriol ; Muller, Philippe . In: CEPR Discussion Papers. RePEc:cpr:ceprdp:11375. Full description at Econpapers \|\| Download paper
2016	On the Comparative Advantage of U.S. Manufacturing: Evidence from the Shale Gas Revolution. (2016). arezki, rabah ; Fetzer, Thiemo . In: CAGE Online Working Paper Series. RePEc:cge:wacage:259. Full description at Econpapers \|\| Download paper
2016	On the Comparative Advantage of U.S. Manufacturing: Evidence from the Shale Gas Revolution. (2016). Fetzer, Thiemo . In: CEP Discussion Papers. RePEc:cep:cepdps:dp1399. Full description at Econpapers \|\| Download paper
2016	On the Comparative Advantage of U.S. Manufacturing: Evidence from the Shale Gas Revolution. (2016). arezki, rabah ; Fetzer, Thiemo . In: The Warwick Economics Research Paper Series (TWERPS). RePEc:wrk:warwec:1106. Full description at Econpapers \|\| Download paper
2016	On the Comparative Advantage of US Manufacturing: Evidence from the Shale Gas Revolution. (2016). arezki, rabah ; Fetzer, Thiemo . In: OxCarre Working Papers. RePEc:oxf:oxcrwp:167. Full description at Econpapers \|\| Download paper
2016	Renewable Technology Adoption and the Macroeconomy. (2016). Nezami Narajabad, Borghan ; Adao, Bernardino ; Temzelides, Ted . In: 2016 Meeting Papers. RePEc:red:sed016:6. Full description at Econpapers \|\| Download paper
2016	Transition to Clean Technology. (2016). Kerr, William ; Hanley, Douglas ; Akcigit, Ufuk ; Acemoglu, Daron. In: Journal of Political Economy. RePEc:ucp:jpolec:doi:10.1086/684511. Full description at Econpapers \|\| Download paper
2016	Illiquidity and its discontents: Trading delays and foreclosures in the housing market. (2016). Hedlund, Aaron . In: Journal of Monetary Economics. RePEc:eee:moneco:v:83:y:2016:i:c:p:1-13. Full description at Econpapers \|\| Download paper
2016	OPTIMAL ALLOCATION WITH EX-POST VERIFICATION AND LIMITED PENALTIES. (2016). Zapechelnyuk, Andriy ; Mylovanov, Tymofiy . In: Working Papers. RePEc:gla:glaewp:2016_21. Full description at Econpapers \|\| Download paper
2016	The Political Economy of Debt and Entitlements. (2016). Persico, Nicola ; Lizzeri, Alessandro ; Bouton, Laurent. In: NBER Working Papers. RePEc:nbr:nberwo:22570. Full description at Econpapers \|\| Download paper
2016	Insolvency after the 2005 Bankruptcy Reform. (2016). Nosal, Jaromir ; Albanesi, Stefania. In: 2016 Meeting Papers. RePEc:red:sed016:1147. Full description at Econpapers \|\| Download paper

Recent citations (cites in year: CiY)

Recent citations received in 2015

Year	Citing document

Recent citations received in 2014

Year	Citing document
2014	Robust Dynamic Optimal Taxation and Environmental Externalities. (2014). Temzelides, Ted ; Nezami Narajabad, Borghan. In: CESifo Working Paper Series. RePEc:ces:ceswps:_4562. Full description at Econpapers \|\| Download paper
2014	Robust Dynamic Optimal Taxation and Environmental Externalities. (2014). Nezami Narajabad, Borghan ; Li, Xin ; Temzelides, Theodosios. In: Finance and Economics Discussion Series. RePEc:fip:fedgfe:2014-75. Full description at Econpapers \|\| Download paper
2014	Transition to Clean Technology. (2014). Acemoglu, Daron ; Kerr, William ; Akcigit, Ufuk ; Hanley, Douglas . In: Working Paper. RePEc:pit:wpaper:534. Full description at Econpapers \|\| Download paper
2014	Robust Dynamic Optimal Taxation and Environmental Externalities. (2014). Temzelides, Ted ; Nezami Narajabad, Borghan. In: 2014 Meeting Papers. RePEc:red:sed014:59. Full description at Econpapers \|\| Download paper
2014	A Nonparametric Test of Exogenous Participation in First-Price Auctions. (2014). Liu, Nianqing ; Luo, Yao . In: Working Papers. RePEc:tor:tecipa:tecipa-519. Full description at Econpapers \|\| Download paper

10 most frequent citing series

#		Series	Cites

Warning!! This is still an experimental service. The results of this service should be interpreted with care, especially in research assessment exercises. The processing of documents is automatic. There still are errors and omissions in the identification of references. We are working to improve the software to increase the accuracy of the results.

Source data used to compute the impact factor of RePEc series.