null
Impact Factor
null
5-Years IF
24
5-Years H index
null
Impact Factor
null
5-Years IF
24
5-Years H index
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 |
 
# | Year | Title | Cited |
---|---|---|---|
1 | 2007 | Agricultural Extension. (2007). Feder, Gershon ; Anderson, Jock R.. In: Handbook of Agricultural Economics. RePEc:eee:hagchp:5-44. Full description at Econpapers || Download paper | 242 |
2 | 2001 | The agricultural innovation process: Research and technology adoption in a changing agricultural sector. (2001). Sunding, David ; Zilberman, David. In: Handbook of Agricultural Economics. RePEc:eee:hagchp:1-04. Full description at Econpapers || Download paper | 120 |
3 | 2001 | Spatial price analysis. (2001). Goodwin, Barry K. ; Fackler, Paul L. ; P aul L. F ackler, . In: Handbook of Agricultural Economics. RePEc:eee:hagchp:2-17. Full description at Econpapers || Download paper | 111 |
4 | 2002 | Food security and food assistance programs. (2002). Barrett, Christopher B.. In: Handbook of Agricultural Economics. RePEc:eee:hagchp:4-40. Full description at Econpapers || Download paper | 78 |
5 | 2002 | Political economy of agricultural policy. (2002). DeGorter, Harry ; Swinnen, Johan ; de Gorter, Harry. In: Handbook of Agricultural Economics. RePEc:eee:hagchp:4-36. Full description at Econpapers || Download paper | 64 |
6 | 2001 | Economic impacts of agricultural research and extension. (2001). Evenson, Robert E.. In: Handbook of Agricultural Economics. RePEc:eee:hagchp:1-11. Full description at Econpapers || Download paper | 59 |
7 | 2001 | Land institutions and land markets. (2001). Feder, Gershon ; Deininger, Klaus. In: Handbook of Agricultural Economics. RePEc:eee:hagchp:1-06. Full description at Econpapers || Download paper | 57 |
8 | 2001 | Uncertainty, risk aversion, and risk management for agricultural producers. (2001). Hennessy, David A. ; Moschini, Giancarlo. In: Handbook of Agricultural Economics. RePEc:eee:hagchp:1-02. Full description at Econpapers || Download paper | 55 |
9 | 2001 | Human capital: Migration and rural population change. (2001). Taylor, Edward J. ; Martin, Philip L.. In: Handbook of Agricultural Economics. RePEc:eee:hagchp:1-09. Full description at Econpapers || Download paper | 49 |
10 | 2002 | The incidence of agricultural policy. (2002). James, Jennifer S. ; Alston, Julian M.. In: Handbook of Agricultural Economics. RePEc:eee:hagchp:4-33. Full description at Econpapers || Download paper | 46 |
11 | 2007 | Rural Financial Markets in Developing Countries. (2007). Udry, Christopher ; Conning, Jonathan . In: Handbook of Agricultural Economics. RePEc:eee:hagchp:5-56. Full description at Econpapers || Download paper | 44 |
12 | 2001 | Food processing and distribution: An industrial organization approach. (2001). Lavoie, Nathalie ; Sexton, Richard J.. In: Handbook of Agricultural Economics. RePEc:eee:hagchp:2-15. Full description at Econpapers || Download paper | 44 |
13 | 2007 | Transformation of Markets for Agricultural Output in Developing Countries Since 1950: How Has Thinking Changed?. (2007). Timmer, Peter C. ; Reardon, Thomas. In: Handbook of Agricultural Economics. RePEc:eee:hagchp:5-55. Full description at Econpapers || Download paper | 38 |
14 | 2001 | Human capital: Education and agriculture. (2001). Huffman, Wallace E.. In: Handbook of Agricultural Economics. RePEc:eee:hagchp:1-07. Full description at Econpapers || Download paper | 36 |
15 | 2001 | Production and supply. (2001). Mundlak, Yair. In: Handbook of Agricultural Economics. RePEc:eee:hagchp:1-01. Full description at Econpapers || Download paper | 33 |
16 | 2001 | Structural change in agricultural production: Economics, technology and policy. (2001). Chavas, Jean-Paul. In: Handbook of Agricultural Economics. RePEc:eee:hagchp:1-05. Full description at Econpapers || Download paper | 33 |
17 | 2001 | Economic analysis of food safety. (2001). Antle, John M.. In: Handbook of Agricultural Economics. RePEc:eee:hagchp:2-19. Full description at Econpapers || Download paper | 28 |
18 | 2002 | Agriculture and the environment. (2002). Lichtenberg, Erik. In: Handbook of Agricultural Economics. RePEc:eee:hagchp:3-23. Full description at Econpapers || Download paper | 28 |
19 | 2001 | Agricultural finance: Credit, credit constraints, and consequences. (2001). Robison, Lindon J. ; Barry, Peter J.. In: Handbook of Agricultural Economics. RePEc:eee:hagchp:1-10. Full description at Econpapers || Download paper | 27 |
20 | 2002 | Agriculture and economic development. (2002). Timmer, Peter C.. In: Handbook of Agricultural Economics. RePEc:eee:hagchp:3-29. Full description at Econpapers || Download paper | 27 |
21 | 2001 | Marketing margins: Empirical analysis. (2001). Wohlgenant, Michael K.. In: Handbook of Agricultural Economics. RePEc:eee:hagchp:2-16. Full description at Econpapers || Download paper | 27 |
22 | 2010 | Farm Size. (2010). Newell, Andrew ; Eastwood, Robert ; Lipton, Michael. In: Handbook of Agricultural Economics. RePEc:eee:hagchp:6-65. Full description at Econpapers || Download paper | 26 |
23 | 2007 | Agricultural Mechanization: Adoption Patterns and Economic Impact. (2007). Pingali, Prabhu. In: Handbook of Agricultural Economics. RePEc:eee:hagchp:5-54. Full description at Econpapers || Download paper | 25 |
24 | 2007 | Efficiency and Equity Effects of Land Markets. (2007). Otsuka, Keijiro. In: Handbook of Agricultural Economics. RePEc:eee:hagchp:5-51. Full description at Econpapers || Download paper | 24 |
25 | 2001 | Expectations, information and dynamics. (2001). Bessler, David A. ; Nerlove, Marc. In: Handbook of Agricultural Economics. RePEc:eee:hagchp:1-03. Full description at Econpapers || Download paper | 20 |
26 | 2010 | Agricultural Productivity and Economic Growth. (2010). Gollin, Douglas. In: Handbook of Agricultural Economics. RePEc:eee:hagchp:6-73. Full description at Econpapers || Download paper | 20 |
27 | 2001 | Womens roles in the agricultural household: Bargaining and human capital investments. (2001). Schultz, Paul T.. In: Handbook of Agricultural Economics. RePEc:eee:hagchp:1-08. Full description at Econpapers || Download paper | 17 |
28 | 2007 | The Economics of Water, Irrigation, and Development. (2007). Zilberman, David ; Schoengold, Karina. In: Handbook of Agricultural Economics. RePEc:eee:hagchp:5-58. Full description at Econpapers || Download paper | 15 |
29 | 2002 | The macroeconomics of agriculture. (2002). Freebairn, John ; Ardeni, Pier Giorgio . In: Handbook of Agricultural Economics. RePEc:eee:hagchp:3-28. Full description at Econpapers || Download paper | 14 |
30 | 2001 | Storage and price stabilization. (2001). Wright, Brian . In: Handbook of Agricultural Economics. RePEc:eee:hagchp:2-14. Full description at Econpapers || Download paper | 12 |
31 | 2001 | Commodity futures and options. (2001). Williams, Jeffrey C.. In: Handbook of Agricultural Economics. RePEc:eee:hagchp:2-13. Full description at Econpapers || Download paper | 10 |
32 | 2002 | The economics of agriculture in developing countries: The role of the environment. (2002). Lopez, Ramon . In: Handbook of Agricultural Economics. RePEc:eee:hagchp:3-22. Full description at Econpapers || Download paper | 10 |
33 | 2002 | Agriculture and ecosystem services. (2002). Small, Arthur A. ; Heal, Geoffrey M.. In: Handbook of Agricultural Economics. RePEc:eee:hagchp:3-25. Full description at Econpapers || Download paper | 9 |
34 | 2007 | Fertilizers and other farm chemicals. (2007). Norton, George W. ; Heisey, Paul W.. In: Handbook of Agricultural Economics. RePEc:eee:hagchp:5-53. Full description at Econpapers || Download paper | 9 |
35 | 2002 | Agriculture and the macroeconomy, with emphasis on developing countries. (2002). Valdes, Alberto ; Schiff, Maurice. In: Handbook of Agricultural Economics. RePEc:eee:hagchp:3-27. Full description at Econpapers || Download paper | 9 |
36 | 2002 | Applied general equilibrium analysis of agricultural and resource policies. (2002). Hertel, Thomas W.. In: Handbook of Agricultural Economics. RePEc:eee:hagchp:3-26. Full description at Econpapers || Download paper | 9 |
37 | 2002 | Public policy: Its many analytical dimensions. (2002). Rausser, Gordon C. ; Goodhue, Rachael E.. In: Handbook of Agricultural Economics. RePEc:eee:hagchp:4-39. Full description at Econpapers || Download paper | 9 |
38 | 2010 | Total Factor Productivity Growth in Agriculture: The Role of Technological Capital. (2010). Dias Avila, Antonio Flavio, ; Evenson, Robert E.. In: Handbook of Agricultural Economics. RePEc:eee:hagchp:6-72. Full description at Econpapers || Download paper | 8 |
39 | 2002 | Common-pool resources and institutions: Toward a revised theory. (2002). Ostrom, Elinor. In: Handbook of Agricultural Economics. RePEc:eee:hagchp:3-24. Full description at Econpapers || Download paper | 8 |
40 | 2002 | A synthesis of agricultural trade economics. (2002). Perloff, Jeffrey M. ; Karp, Larry S.. In: Handbook of Agricultural Economics. RePEc:eee:hagchp:4-37. Full description at Econpapers || Download paper | 8 |
41 | 2001 | The agricultural producer: Theory and statistical measurement. (2001). Just, Richard E. ; Pope, Rulon D.. In: Handbook of Agricultural Economics. RePEc:eee:hagchp:1-12. Full description at Econpapers || Download paper | 8 |
42 | 2007 | Livestock Productivity in Developing Countries: An Assessment. (2007). Nin, Alejandro ; Ehui, Simeon ; Benin, Samuel. In: Handbook of Agricultural Economics. RePEc:eee:hagchp:5-47. Full description at Econpapers || Download paper | 7 |
43 | 2001 | Duality for the household: Theory and applications. (2001). LaFrance, Jeffrey T.. In: Handbook of Agricultural Economics. RePEc:eee:hagchp:2-18. Full description at Econpapers || Download paper | 7 |
44 | 2010 | Rural Poverty and Income Dynamics in Southeast Asia. (2010). Estudillo, Jonna P. ; Otsuka, Keijiro. In: Handbook of Agricultural Economics. RePEc:eee:hagchp:6-67. Full description at Econpapers || Download paper | 7 |
45 | 2007 | The Role of International Agricultural Research in Contributing to Global Food Security and Poverty Alleviation: The case of the CGIAR. (2007). Pingali, Prabhu ; Kelley, Tim . In: Handbook of Agricultural Economics. RePEc:eee:hagchp:5-45. Full description at Econpapers || Download paper | 6 |
46 | 2002 | The rural sector in transition economies. (2002). Nash, John ; Brooks, Karen. In: Handbook of Agricultural Economics. RePEc:eee:hagchp:3-30. Full description at Econpapers || Download paper | 6 |
47 | Macroeconomics, Macrosectoral Policies, and Agriculture in Developing Countries. (2010). Diaz-Bonilla, Eugenio ; Robinson, Sherman. In: Handbook of Agricultural Economics. RePEc:eee:hagchp:6-61. Full description at Econpapers || Download paper | 5 | |
48 | 2002 | Information, incentives, and the design of agricultural policies. (2002). Chambers, Robert G.. In: Handbook of Agricultural Economics. RePEc:eee:hagchp:4-34. Full description at Econpapers || Download paper | 5 |
49 | 2007 | Labor: Decisions, Contracts and Organization. (2007). Roumasset, James ; Lee, Sang-Hyop. In: Handbook of Agricultural Economics. RePEc:eee:hagchp:5-52. Full description at Econpapers || Download paper | 5 |
50 | 2010 | Agriculture Renaissance: Making Agriculture for Development Work in the 21st Century. (2010). Pingali, Prabhu. In: Handbook of Agricultural Economics. RePEc:eee:hagchp:6-74. Full description at Econpapers || Download paper | 5 |
# | Year | Title | Cited |
---|---|---|---|
1 | 2001 | Spatial price analysis. (2001). Goodwin, Barry K. ; Fackler, Paul L. ; P aul L. F ackler, . In: Handbook of Agricultural Economics. RePEc:eee:hagchp:2-17. Full description at Econpapers || Download paper | 23 |
2 | 2007 | Agricultural Mechanization: Adoption Patterns and Economic Impact. (2007). Pingali, Prabhu. In: Handbook of Agricultural Economics. RePEc:eee:hagchp:5-54. Full description at Econpapers || Download paper | 22 |
3 | 2007 | Rural Financial Markets in Developing Countries. (2007). Udry, Christopher ; Conning, Jonathan . In: Handbook of Agricultural Economics. RePEc:eee:hagchp:5-56. Full description at Econpapers || Download paper | 21 |
4 | 2001 | The agricultural innovation process: Research and technology adoption in a changing agricultural sector. (2001). Sunding, David ; Zilberman, David. In: Handbook of Agricultural Economics. RePEc:eee:hagchp:1-04. Full description at Econpapers || Download paper | 21 |
5 | 2002 | Food security and food assistance programs. (2002). Barrett, Christopher B.. In: Handbook of Agricultural Economics. RePEc:eee:hagchp:4-40. Full description at Econpapers || Download paper | 21 |
6 | 2001 | Land institutions and land markets. (2001). Feder, Gershon ; Deininger, Klaus. In: Handbook of Agricultural Economics. RePEc:eee:hagchp:1-06. Full description at Econpapers || Download paper | 15 |
7 | 2010 | Agricultural Productivity and Economic Growth. (2010). Gollin, Douglas. In: Handbook of Agricultural Economics. RePEc:eee:hagchp:6-73. Full description at Econpapers || Download paper | 13 |
8 | 2001 | Economic impacts of agricultural research and extension. (2001). Evenson, Robert E.. In: Handbook of Agricultural Economics. RePEc:eee:hagchp:1-11. Full description at Econpapers || Download paper | 13 |
9 | 2001 | Uncertainty, risk aversion, and risk management for agricultural producers. (2001). Hennessy, David A. ; Moschini, Giancarlo. In: Handbook of Agricultural Economics. RePEc:eee:hagchp:1-02. Full description at Econpapers || Download paper | 12 |
10 | 2010 | Farm Size. (2010). Newell, Andrew ; Eastwood, Robert ; Lipton, Michael. In: Handbook of Agricultural Economics. RePEc:eee:hagchp:6-65. Full description at Econpapers || Download paper | 11 |
11 | 2007 | Agricultural Extension. (2007). Feder, Gershon ; Anderson, Jock R.. In: Handbook of Agricultural Economics. RePEc:eee:hagchp:5-44. Full description at Econpapers || Download paper | 10 |
12 | 2002 | The economics of agriculture in developing countries: The role of the environment. (2002). Lopez, Ramon . In: Handbook of Agricultural Economics. RePEc:eee:hagchp:3-22. Full description at Econpapers || Download paper | 9 |
13 | 2007 | Efficiency and Equity Effects of Land Markets. (2007). Otsuka, Keijiro. In: Handbook of Agricultural Economics. RePEc:eee:hagchp:5-51. Full description at Econpapers || Download paper | 8 |
14 | 2001 | Structural change in agricultural production: Economics, technology and policy. (2001). Chavas, Jean-Paul. In: Handbook of Agricultural Economics. RePEc:eee:hagchp:1-05. Full description at Econpapers || Download paper | 8 |
15 | 2007 | Transformation of Markets for Agricultural Output in Developing Countries Since 1950: How Has Thinking Changed?. (2007). Timmer, Peter C. ; Reardon, Thomas. In: Handbook of Agricultural Economics. RePEc:eee:hagchp:5-55. Full description at Econpapers || Download paper | 7 |
16 | 2001 | Food processing and distribution: An industrial organization approach. (2001). Lavoie, Nathalie ; Sexton, Richard J.. In: Handbook of Agricultural Economics. RePEc:eee:hagchp:2-15. Full description at Econpapers || Download paper | 7 |
17 | 2002 | The incidence of agricultural policy. (2002). James, Jennifer S. ; Alston, Julian M.. In: Handbook of Agricultural Economics. RePEc:eee:hagchp:4-33. Full description at Econpapers || Download paper | 6 |
18 | 2010 | Total Factor Productivity Growth in Agriculture: The Role of Technological Capital. (2010). Dias Avila, Antonio Flavio, ; Evenson, Robert E.. In: Handbook of Agricultural Economics. RePEc:eee:hagchp:6-72. Full description at Econpapers || Download paper | 5 |
19 | 2007 | The Economics of Water, Irrigation, and Development. (2007). Zilberman, David ; Schoengold, Karina. In: Handbook of Agricultural Economics. RePEc:eee:hagchp:5-58. Full description at Econpapers || Download paper | 5 |
20 | 2002 | Agriculture and the macroeconomy, with emphasis on developing countries. (2002). Valdes, Alberto ; Schiff, Maurice. In: Handbook of Agricultural Economics. RePEc:eee:hagchp:3-27. Full description at Econpapers || Download paper | 5 |
21 | 2001 | Marketing margins: Empirical analysis. (2001). Wohlgenant, Michael K.. In: Handbook of Agricultural Economics. RePEc:eee:hagchp:2-16. Full description at Econpapers || Download paper | 5 |
22 | 2002 | The macroeconomics of agriculture. (2002). Freebairn, John ; Ardeni, Pier Giorgio . In: Handbook of Agricultural Economics. RePEc:eee:hagchp:3-28. Full description at Econpapers || Download paper | 4 |
23 | 2010 | Agriculture Renaissance: Making Agriculture for Development Work in the 21st Century. (2010). Pingali, Prabhu. In: Handbook of Agricultural Economics. RePEc:eee:hagchp:6-74. Full description at Econpapers || Download paper | 4 |
24 | 2002 | A synthesis of agricultural trade economics. (2002). Perloff, Jeffrey M. ; Karp, Larry S.. In: Handbook of Agricultural Economics. RePEc:eee:hagchp:4-37. Full description at Econpapers || Download paper | 4 |
25 | 2001 | Human capital: Migration and rural population change. (2001). Taylor, Edward J. ; Martin, Philip L.. In: Handbook of Agricultural Economics. RePEc:eee:hagchp:1-09. Full description at Econpapers || Download paper | 4 |
26 | 2010 | Macroeconomics, Macrosectoral Policies, and Agriculture in Developing Countries. (2010). Diaz-Bonilla, Eugenio ; Robinson, Sherman. In: Handbook of Agricultural Economics. RePEc:eee:hagchp:6-61. Full description at Econpapers || Download paper | 3 |
27 | 2001 | The agricultural producer: Theory and statistical measurement. (2001). Just, Richard E. ; Pope, Rulon D.. In: Handbook of Agricultural Economics. RePEc:eee:hagchp:1-12. Full description at Econpapers || Download paper | 3 |
28 | 2010 | Rural Poverty and Income Dynamics in Southeast Asia. (2010). Estudillo, Jonna P. ; Otsuka, Keijiro. In: Handbook of Agricultural Economics. RePEc:eee:hagchp:6-67. Full description at Econpapers || Download paper | 3 |
29 | 2002 | Agriculture and economic development. (2002). Timmer, Peter C.. In: Handbook of Agricultural Economics. RePEc:eee:hagchp:3-29. Full description at Econpapers || Download paper | 3 |
30 | 2007 | The Role of International Agricultural Research in Contributing to Global Food Security and Poverty Alleviation: The case of the CGIAR. (2007). Pingali, Prabhu ; Kelley, Tim . In: Handbook of Agricultural Economics. RePEc:eee:hagchp:5-45. Full description at Econpapers || Download paper | 3 |
31 | 2002 | Agriculture and the environment. (2002). Lichtenberg, Erik. In: Handbook of Agricultural Economics. RePEc:eee:hagchp:3-23. Full description at Econpapers || Download paper | 3 |
32 | 2010 | Agricultural Productivity in Latin America and the Caribbean and Sources of Growth. (2010). Dias Avila, Antonio Flavio, ; Romano, Luis ; Garagorry, Fernando . In: Handbook of Agricultural Economics. RePEc:eee:hagchp:6-71. Full description at Econpapers || Download paper | 3 |
33 | 2001 | Womens roles in the agricultural household: Bargaining and human capital investments. (2001). Schultz, Paul T.. In: Handbook of Agricultural Economics. RePEc:eee:hagchp:1-08. Full description at Econpapers || Download paper | 3 |
34 | 2001 | Agricultural finance: Credit, credit constraints, and consequences. (2001). Robison, Lindon J. ; Barry, Peter J.. In: Handbook of Agricultural Economics. RePEc:eee:hagchp:1-10. Full description at Econpapers || Download paper | 3 |
35 | 2002 | Common-pool resources and institutions: Toward a revised theory. (2002). Ostrom, Elinor. In: Handbook of Agricultural Economics. RePEc:eee:hagchp:3-24. Full description at Econpapers || Download paper | 2 |
36 | 2002 | Agriculture and ecosystem services. (2002). Small, Arthur A. ; Heal, Geoffrey M.. In: Handbook of Agricultural Economics. RePEc:eee:hagchp:3-25. Full description at Econpapers || Download paper | 2 |
37 | 2001 | Expectations, information and dynamics. (2001). Bessler, David A. ; Nerlove, Marc. In: Handbook of Agricultural Economics. RePEc:eee:hagchp:1-03. Full description at Econpapers || Download paper | 2 |
38 | 2002 | Political economy of agricultural policy. (2002). DeGorter, Harry ; Swinnen, Johan ; de Gorter, Harry. In: Handbook of Agricultural Economics. RePEc:eee:hagchp:4-36. Full description at Econpapers || Download paper | 2 |
39 | 2001 | Production and supply. (2001). Mundlak, Yair. In: Handbook of Agricultural Economics. RePEc:eee:hagchp:1-01. Full description at Econpapers || Download paper | 2 |
40 | 2010 | International Trade Policies Affecting Agricultural Incentives in Developing Countries. (2010). Anderson, Kym. In: Handbook of Agricultural Economics. RePEc:eee:hagchp:6-62. Full description at Econpapers || Download paper | 2 |
41 | 2001 | Human capital: Education and agriculture. (2001). Huffman, Wallace E.. In: Handbook of Agricultural Economics. RePEc:eee:hagchp:1-07. Full description at Econpapers || Download paper | 2 |
42 | 2007 | Fertilizers and other farm chemicals. (2007). Norton, George W. ; Heisey, Paul W.. In: Handbook of Agricultural Economics. RePEc:eee:hagchp:5-53. Full description at Econpapers || Download paper | 2 |
43 | 2007 | Livestock Productivity in Developing Countries: An Assessment. (2007). Nin, Alejandro ; Ehui, Simeon ; Benin, Samuel. In: Handbook of Agricultural Economics. RePEc:eee:hagchp:5-47. Full description at Econpapers || Download paper | 2 |
44 | 2001 | Economic analysis of food safety. (2001). Antle, John M.. In: Handbook of Agricultural Economics. RePEc:eee:hagchp:2-19. Full description at Econpapers || Download paper | 2 |
Year | Title |
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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.
CitEc is a RePEc service, providing citation data for Economics since 2001. Sponsored by INOMICS. Last updated December, 2th 2018. Contact: CitEc Team