Citation analysis for British Actuarial Journal / Cambridge University Press

British Actuarial Journal / Cambridge University Press

0.03

Impact Factor

0.02

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		(%)			0.04
1991		0.09			0				0		0		(%)			0.04
1992		0.1			0				0		0		(%)			0.04
1993		0.11			0				0		0		(%)			0.05
1994		0.12			0				0		0		(%)			0.05
1995		0.19		40	40			26	0		0		(%)			0.07
1996		0.22		34	74			17	40		40		(%)			0.09
1997	0.04	0.27	0.04	24	98	4	0.04	17	74	3	74	3	(%)			0.09
1998	0.02	0.27	0.01	27	125	1	0.01	13	58	1	98	1	(%)			0.1
1999	0.02	0.31	0.02	28	153	5	0.03	10	51	1	125	3	(%)			0.13
2000	0.04	0.4	0.04	20	173	7	0.04	4	55	2	153	6	(%)			0.15
2001	0.06	0.4	0.05	24	197	8	0.04	13	48	3	133	6	(%)			0.15
2002		0.42	0.01	29	226	2	0.01	56	44		123	1	(%)			0.18
2003	0.04	0.44	0.04	28	254	8	0.03	39	53	2	128	5	(%)	1	0.04	0.18
2004	0.07	0.49	0.04	23	277	8	0.03	33	57	4	129	5	(%)			0.2
2005	0.06	0.53	0.04	14	291	12	0.04	5	51	3	124	5	(%)			0.21
2006	0.08	0.51	0.06	14	305	17	0.06	37	37	3	118	7	(%)	2	0.14	0.2
2007	0.07	0.44	0.08	9	314	12	0.04	2	28	2	108	9	(%)			0.18
2008	0.13	0.47	0.13	7	321	31	0.1	9	23	3	88	11	(%)			0.2
2009		0.47	0.09	24	345	28	0.08	4	16		67	6	(%)			0.19
2010	0.03	0.44	0.12		345	26	0.08		31	1	68	8	(%)			0.16
2011	0.04	0.51	0.13	23	368	19	0.05	8	24	1	54	7	(%)	1	0.04	0.2
2012	0.09	0.56	0.06	28	396	19	0.05	2	23	2	63	4	(%)			0.21
2013	0.02	0.66	0.04	29	425	20	0.05	3	51	1	82	3	(%)			0.23
2014		0.67	0.01	32	457	18	0.04	3	57		104	1	(%)			0.22
2015	0.03	0.82	0.02	12	469	39	0.08		61	2	112	2	(%)			0.27

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	Stochastic Claims Reserving in General Insurance. (2002). England, P D ; Verrall, R J. In: British Actuarial Journal. RePEc:cup:bracjl:v:8:y:2002:i:03:p:443-518_00. Full description at Econpapers \|\| Download paper	38
2	2006	Living with Mortality: Longevity Bonds and Other Mortality-Linked Securities. (2006). Blake, D ; Dowd, K. In: British Actuarial Journal. RePEc:cup:bracjl:v:12:y:2006:i:01:p:153-197_00. Full description at Econpapers \|\| Download paper	35
3	1995	More on a Stochastic Asset Model for Actuarial Use. (1995). Wilkie, A D. In: British Actuarial Journal. RePEc:cup:bracjl:v:1:y:1995:i:05:p:777-964_00. Full description at Econpapers \|\| Download paper	20
4	2004	The Cohort Effect: Insights and Explanations. (2004). Willets, R C. In: British Actuarial Journal. RePEc:cup:bracjl:v:10:y:2004:i:04:p:833-877_00. Full description at Econpapers \|\| Download paper	17
5	1997	The Financial Theory of Defined Benefit Pension Schemes. (1997). Exley, C J ; Smith, A D. In: British Actuarial Journal. RePEc:cup:bracjl:v:3:y:1997:i:04:p:835-966_00. Full description at Econpapers \|\| Download paper	13
6	1996	The Modelling of Recent Mortality Trends in United Kingdom Male Assured Lives. (1996). Renshaw, A E ; Hatzopoulos, P ; Haberman, S. In: British Actuarial Journal. RePEc:cup:bracjl:v:2:y:1996:i:02:p:449-477_00. Full description at Econpapers \|\| Download paper	12
7	2003	Global Asset Liability Management. (2003). Villaverde, M ; Medova, E A ; Germano, M. In: British Actuarial Journal. RePEc:cup:bracjl:v:9:y:2003:i:01:p:137-195_00. Full description at Econpapers \|\| Download paper	11
8	2003	Risk Measures and Theories of Choice. (2003). Desli, Evangelia. In: British Actuarial Journal. RePEc:cup:bracjl:v:9:y:2003:i:04:p:959-991_00. Full description at Econpapers \|\| Download paper	10
9	2002	Recent Mortality Trends in the Spanish Population. (2002). Perez-Marin, A M ; Felipe, A ; Guillen, M. In: British Actuarial Journal. RePEc:cup:bracjl:v:8:y:2002:i:04:p:757-786_00. Full description at Econpapers \|\| Download paper	10
10	1998	An International Comparison of Recent Trends in Population Mortality. (1998). Miller, K A ; Gwilt, P L ; MacDonald, A S. In: British Actuarial Journal. RePEc:cup:bracjl:v:4:y:1998:i:01:p:3-141_00. Full description at Econpapers \|\| Download paper	6
11	2008	Variable Annuities. (2008). Ritchie, A J ; Ledlie, M C ; Corry, D P ; Finkelstein, G S ; Su, K. In: British Actuarial Journal. RePEc:cup:bracjl:v:14:y:2008:i:02:p:327-389_00. Full description at Econpapers \|\| Download paper	6
12	2003	A Stochastic Approach to Risk Management and Decision Making in Defined Benefit Pension Schemes. (2003). Haberman, S ; Fogarty, D ; Day, C ; Khorasanee, M Z ; McWhirter, M ; Nash, N ; Wright, I D ; Ngwira, B ; Yakoubov, Y. In: British Actuarial Journal. RePEc:cup:bracjl:v:9:y:2003:i:03:p:493-586_00. Full description at Econpapers \|\| Download paper	6
13	2003	Reserving, Pricing and Hedging For Policies with Guaranteed Annuity Options. (2003). Yang, S ; Waters, H R ; Wilkie, A D. In: British Actuarial Journal. RePEc:cup:bracjl:v:9:y:2003:i:02:p:263-391_00. Full description at Econpapers \|\| Download paper	6
14	2001	Pensions, Funding and Risk. (2001). Chapman, R J ; Speed, C A ; Gordon, T J. In: British Actuarial Journal. RePEc:cup:bracjl:v:7:y:2001:i:04:p:605-662_00. Full description at Econpapers \|\| Download paper	5
15	2011	Systemic Risk in Financial Services. (2011). Booth, Philip ; Besar, D ; Pickles, J ; Chan, K K. In: British Actuarial Journal. RePEc:cup:bracjl:v:16:y:2011:i:02:p:195-300_00. Full description at Econpapers \|\| Download paper	5
16	2001	Stability of Models for the Term Structure of Interest Rates with Application to German Market Data. (2001). Pritchard, D J. In: British Actuarial Journal. RePEc:cup:bracjl:v:7:y:2001:i:03:p:467-507_00. Full description at Econpapers \|\| Download paper	5
17	2004	Determinants of United Kingdom General Insurance Company Performance. (2004). Shiu, Y. In: British Actuarial Journal. RePEc:cup:bracjl:v:10:y:2004:i:05:p:1079-1110_00. Full description at Econpapers \|\| Download paper	5
18	1998	A Stochastic Model Underlying the Chain-Ladder Technique. (1998). Renshaw, A E ; Verrall, R J. In: British Actuarial Journal. RePEc:cup:bracjl:v:4:y:1998:i:04:p:903-923_00. Full description at Econpapers \|\| Download paper	4
19	1999	A Non-Linear Stochastic Asset Model for Actuarial Use. (1999). Thomas, R G ; Whitten, S P. In: British Actuarial Journal. RePEc:cup:bracjl:v:5:y:1999:i:05:p:919-953_00. Full description at Econpapers \|\| Download paper	4
20	2004	Longevity in the 21st Century. (2004). Ryan, J P ; Willets, R C ; Gallop, A P ; Leandro, P A ; MacDonald, A S ; Richards, S J ; Miller, K A ; Robjohns, N ; Waters, H R. In: British Actuarial Journal. RePEc:cup:bracjl:v:10:y:2004:i:04:p:685-832_00. Full description at Econpapers \|\| Download paper	4
21	2004	Market Consistent Valuation of Life Assurance Business. (2004). Sheldon, T J ; Smith, A D. In: British Actuarial Journal. RePEc:cup:bracjl:v:10:y:2004:i:03:p:543-605_00. Full description at Econpapers \|\| Download paper	4
22	2002	A Multi-State Model of Disability for the United Kingdom: Implications for Future Need for Long-Term Care for the Elderly. (2002). Rickayzen, B D. In: British Actuarial Journal. RePEc:cup:bracjl:v:8:y:2002:i:02:p:341-393_00. Full description at Econpapers \|\| Download paper	3
23	1996	How Actuaries Can Use Financial Economics. (1996). Smith, A D. In: British Actuarial Journal. RePEc:cup:bracjl:v:2:y:1996:i:05:p:1057-1193_00. Full description at Econpapers \|\| Download paper	3
24	1995	Pension Fund Asset Valuation and Investment. (1995). , ; Exley, C J. In: British Actuarial Journal. RePEc:cup:bracjl:v:1:y:1995:i:05:p:965-977_00. Full description at Econpapers \|\| Download paper	3
25	2005	Risk Management in a Fair Valuation World. (2005). , . In: British Actuarial Journal. RePEc:cup:bracjl:v:11:y:2005:i:04:p:595-712_00. Full description at Econpapers \|\| Download paper	3
26	2003	Ruin Theory in a Discrete Time Risk Model with Interest Income. (2003). Sun, L ; Yang, H. In: British Actuarial Journal. RePEc:cup:bracjl:v:9:y:2003:i:03:p:637-652_00. Full description at Econpapers \|\| Download paper	3
27	1995	Asset Shares and their Use in the Financial Management of a With-Profits Fund. (1995). Needleman, P D ; Roff, T A. In: British Actuarial Journal. RePEc:cup:bracjl:v:1:y:1995:i:04:p:603-688_00. Full description at Econpapers \|\| Download paper	3
28	1995	Pension Fund Asset Valuation and Investment. (1995). Exley, C J. In: British Actuarial Journal. RePEc:cup:bracjl:v:1:y:1995:i:03:p:471-557_00. Full description at Econpapers \|\| Download paper	3
29	2004	The Measurement and Modelling of Commercial Real Estate Performance. (2004). Booth, Philip ; Marcato, G. In: British Actuarial Journal. RePEc:cup:bracjl:v:10:y:2004:i:01:p:5-61_00. Full description at Econpapers \|\| Download paper	2
30	2001	Estimation in the Constant Elasticity of Variance Model. (2001). Yuen, K C ; Chu, K L ; Yang, H. In: British Actuarial Journal. RePEc:cup:bracjl:v:7:y:2001:i:02:p:275-292_00. Full description at Econpapers \|\| Download paper	2
31	2006	The Importance of Year of Birth in Two-Dimensional Mortality Data. (2006). Kirkby, J G ; Currie, I D ; Richards, S J. In: British Actuarial Journal. RePEc:cup:bracjl:v:12:y:2006:i:01:p:5-38_00. Full description at Econpapers \|\| Download paper	2
32	2013	Mortality and smoking prevalence: An empirical investigation in ten developed countries. (2013). Kleinow, Torsten . In: British Actuarial Journal. RePEc:cup:bracjl:v:18:y:2013:i:02:p:452-466_00. Full description at Econpapers \|\| Download paper	2
33	1999	Property Investment Appraisal. (1999). Booth, Philip ; Adams, A T ; MacGregor, B D. In: British Actuarial Journal. RePEc:cup:bracjl:v:5:y:1999:i:05:p:955-982_00. Full description at Econpapers \|\| Download paper	2
34	2003	Measuring and Managing the Economic Risks and Costs of With-Profits Business. (2003). Turnbull, C J ; Hibbert, A J. In: British Actuarial Journal. RePEc:cup:bracjl:v:9:y:2003:i:04:p:725-777_00. Full description at Econpapers \|\| Download paper	2
35	2008	Applying Survival Models to Pensioner Mortality Data. (2008). Richards, S J. In: British Actuarial Journal. RePEc:cup:bracjl:v:14:y:2008:i:02:p:257-303_00. Full description at Econpapers \|\| Download paper	2
36	2011	Developments in the Management of Annuity Business. (2011). Collinge, E J ; Zhang, F ; Smith, D W ; Little, W ; Johnson, B E ; Fulcher, P ; Browne, B A ; Telford, P G ; Nurse, J M. In: British Actuarial Journal. RePEc:cup:bracjl:v:16:y:2011:i:03:p:471-551_00. Full description at Econpapers \|\| Download paper	2
37	2004	Valuation and Hedging of Limited Price Indexed Liabilities. (2004). , . In: British Actuarial Journal. RePEc:cup:bracjl:v:10:y:2004:i:03:p:627-663_00. Full description at Econpapers \|\| Download paper	2
38	2000	Pensions and Low Inflation. (2000). Horsfall, N P ; Murphy, R F ; Knight, J M ; Kneller, K ; Harrison, J M. In: British Actuarial Journal. RePEc:cup:bracjl:v:6:y:2000:i:03:p:547-619_00. Full description at Econpapers \|\| Download paper	2
39	2005	Current Developments in Embedded Value Reporting. (2005). Ward, M B ; Foroughi, K ; Desai, A J ; Sharp, A C ; Taverner, N H ; Maxwell, A F ; Hibbett, G J. In: British Actuarial Journal. RePEc:cup:bracjl:v:11:y:2005:i:03:p:407-479_00. Full description at Econpapers \|\| Download paper	2
40	1997	Modelling the Impact of Reinsurance on Financial Strength. (1997). Coutts, S M. In: British Actuarial Journal. RePEc:cup:bracjl:v:3:y:1997:i:03:p:583-653_00. Full description at Econpapers \|\| Download paper	2
41	1999	On Numerical Evaluation of Finite Time Survival Probabilities. (1999). , . In: British Actuarial Journal. RePEc:cup:bracjl:v:5:y:1999:i:03:p:575-584_00. Full description at Econpapers \|\| Download paper	2
42	2007	Should Projections of Mortality Improvements be Subject to a Minimum Value?. (2007). Baxter, S D. In: British Actuarial Journal. RePEc:cup:bracjl:v:13:y:2007:i:03:p:375-464_00. Full description at Econpapers \|\| Download paper	2
43	2003	Measuring and Managing the Economic Risks and Costs of With-Profits Business. (2003). Hibbert, A J ; Turnbull, C J. In: British Actuarial Journal. RePEc:cup:bracjl:v:9:y:2003:i:05:p:1141-1154_00. Full description at Econpapers \|\| Download paper	2
44	2011	Developments in the Management of Annuity Business â Abstract of the London Discussion. (2011). Telford, Peter . In: British Actuarial Journal. RePEc:cup:bracjl:v:16:y:2011:i:03:p:577-599_00. Full description at Econpapers \|\| Download paper	1
45	1999	The Need for Theory in Actuarial Economic Models. (1999). Verrall, R J ; Huber, P P. In: British Actuarial Journal. RePEc:cup:bracjl:v:5:y:1999:i:02:p:377-395_00. Full description at Econpapers \|\| Download paper	1
46	2014	Investigating risk reporting practices in the global insurance industry. (2014). Dubey, R ; Kumar, A ; Klumpes, P. In: British Actuarial Journal. RePEc:cup:bracjl:v:19:y:2014:i:03:p:692-727_00. Full description at Econpapers \|\| Download paper	1
47	1996	On the Graduation of âAmountsâ. (1996). Hatzopoulos, P ; Renshaw, A E. In: British Actuarial Journal. RePEc:cup:bracjl:v:2:y:1996:i:01:p:185-205_00. Full description at Econpapers \|\| Download paper	1
48	2002	On Valuation and Risk Management at the Interface of Insurance and Finance. (2002). Moller, T. In: British Actuarial Journal. RePEc:cup:bracjl:v:8:y:2002:i:04:p:787-827_00. Full description at Econpapers \|\| Download paper	1
49	2011	What Longevity Predictors Should Be Allowed for When Valuing Pension Scheme Liabilities?. (2011). Madrigal, A M ; Baxter, S D ; Gaches, A T ; Patel, D D ; Matthews, F E. In: British Actuarial Journal. RePEc:cup:bracjl:v:16:y:2011:i:01:p:1-38_00. Full description at Econpapers \|\| Download paper	1
50	1995	The Prospect of Mortality: England and Wales and the United States of America, 1962â1989. (1995). Murphy, M J. In: British Actuarial Journal. RePEc:cup:bracjl:v:1:y:1995:i:02:p:331-350_00. 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	2006	Living with Mortality: Longevity Bonds and Other Mortality-Linked Securities. (2006). Blake, D ; Dowd, K. In: British Actuarial Journal. RePEc:cup:bracjl:v:12:y:2006:i:01:p:153-197_00. Full description at Econpapers \|\| Download paper	13
2	2004	The Cohort Effect: Insights and Explanations. (2004). Willets, R C. In: British Actuarial Journal. RePEc:cup:bracjl:v:10:y:2004:i:04:p:833-877_00. Full description at Econpapers \|\| Download paper	7
3	2002	Stochastic Claims Reserving in General Insurance. (2002). England, P D ; Verrall, R J. In: British Actuarial Journal. RePEc:cup:bracjl:v:8:y:2002:i:03:p:443-518_00. Full description at Econpapers \|\| Download paper	6
4	2003	Risk Measures and Theories of Choice. (2003). Desli, Evangelia. In: British Actuarial Journal. RePEc:cup:bracjl:v:9:y:2003:i:04:p:959-991_00. Full description at Econpapers \|\| Download paper	5
5	2004	Determinants of United Kingdom General Insurance Company Performance. (2004). Shiu, Y. In: British Actuarial Journal. RePEc:cup:bracjl:v:10:y:2004:i:05:p:1079-1110_00. Full description at Econpapers \|\| Download paper	3
6	2002	Recent Mortality Trends in the Spanish Population. (2002). Perez-Marin, A M ; Felipe, A ; Guillen, M. In: British Actuarial Journal. RePEc:cup:bracjl:v:8:y:2002:i:04:p:757-786_00. Full description at Econpapers \|\| Download paper	3
7	2003	A Stochastic Approach to Risk Management and Decision Making in Defined Benefit Pension Schemes. (2003). Haberman, S ; Fogarty, D ; Day, C ; Khorasanee, M Z ; McWhirter, M ; Nash, N ; Wright, I D ; Ngwira, B ; Yakoubov, Y. In: British Actuarial Journal. RePEc:cup:bracjl:v:9:y:2003:i:03:p:493-586_00. Full description at Econpapers \|\| Download paper	3
8	2008	Variable Annuities. (2008). Ritchie, A J ; Ledlie, M C ; Corry, D P ; Finkelstein, G S ; Su, K. In: British Actuarial Journal. RePEc:cup:bracjl:v:14:y:2008:i:02:p:327-389_00. Full description at Econpapers \|\| Download paper	3
9	2001	Pensions, Funding and Risk. (2001). Chapman, R J ; Speed, C A ; Gordon, T J. In: British Actuarial Journal. RePEc:cup:bracjl:v:7:y:2001:i:04:p:605-662_00. Full description at Econpapers \|\| Download paper	3
10	2001	Stability of Models for the Term Structure of Interest Rates with Application to German Market Data. (2001). Pritchard, D J. In: British Actuarial Journal. RePEc:cup:bracjl:v:7:y:2001:i:03:p:467-507_00. Full description at Econpapers \|\| Download paper	3
11	1997	Modelling the Impact of Reinsurance on Financial Strength. (1997). Coutts, S M. In: British Actuarial Journal. RePEc:cup:bracjl:v:3:y:1997:i:03:p:583-653_00. Full description at Econpapers \|\| Download paper	2
12	1997	The Financial Theory of Defined Benefit Pension Schemes. (1997). Exley, C J ; Smith, A D. In: British Actuarial Journal. RePEc:cup:bracjl:v:3:y:1997:i:04:p:835-966_00. Full description at Econpapers \|\| Download paper	2
13	1998	A Stochastic Model Underlying the Chain-Ladder Technique. (1998). Renshaw, A E ; Verrall, R J. In: British Actuarial Journal. RePEc:cup:bracjl:v:4:y:1998:i:04:p:903-923_00. Full description at Econpapers \|\| Download paper	2
14	2003	Global Asset Liability Management. (2003). Villaverde, M ; Medova, E A ; Germano, M. In: British Actuarial Journal. RePEc:cup:bracjl:v:9:y:2003:i:01:p:137-195_00. Full description at Econpapers \|\| Download paper	2
15	2011	Systemic Risk in Financial Services. (2011). Booth, Philip ; Besar, D ; Pickles, J ; Chan, K K. In: British Actuarial Journal. RePEc:cup:bracjl:v:16:y:2011:i:02:p:195-300_00. Full description at Econpapers \|\| Download paper	2
16	2013	Mortality and smoking prevalence: An empirical investigation in ten developed countries. (2013). Kleinow, Torsten . In: British Actuarial Journal. RePEc:cup:bracjl:v:18:y:2013:i:02:p:452-466_00. Full description at Econpapers \|\| Download paper	2
17	2002	A Multi-State Model of Disability for the United Kingdom: Implications for Future Need for Long-Term Care for the Elderly. (2002). Rickayzen, B D. In: British Actuarial Journal. RePEc:cup:bracjl:v:8:y:2002:i:02:p:341-393_00. Full description at Econpapers \|\| Download paper	2

Citing documents used to compute impact factor 2:

Year	Title
2015	Using bootstrapping to incorporate model error for risk-neutral pricing of longevity risk. (2015). Yang, Bowen ; Balasooriya, Uditha ; Li, Jackie . In: Insurance: Mathematics and Economics. RePEc:eee:insuma:v:62:y:2015:i:c:p:16-27. Full description at Econpapers \|\| Download paper
2015	A common age effect model for the mortality of multiple populations. (2015). Kleinow, Torsten . In: Insurance: Mathematics and Economics. RePEc:eee:insuma:v:63:y:2015:i:c:p:147-152. Full description at Econpapers \|\| Download paper

Recent citations (cites in year: CiY)

Recent citations received in 2014

Year	Citing document

Recent citations received in 2013

Year	Citing document

Recent citations received in 2012

Year	Citing document

10 most frequent citing series

#	Series	Cites
1	Insurance: Mathematics and Economics / Elsevier	30
2	MPRA Paper / University Library of Munich, Germany	3
3	Papers / arXiv.org	3
4	Economic Modelling / Elsevier	2
5	IMF Working Papers / International Monetary Fund	1
6	Working Papers / HAL	1
7	Discussion Paper / Tilburg University, Center for Economic Research	1
8	Demography / Springer	1
9	IMF Staff Country Reports / International Monetary Fund	1
10	Journal of Risk & Insurance / The American Risk and Insurance Association	1
11	Computational Statistics / Springer	1

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.