Do graduate students affect their supervisors’ research

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Do graduate students affect their supervisors’ research?

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Do graduate students affect their supervisors’ research

  1. 1. ATH panel at the 8th International Conference on Webometrics, Informatics and Scientometrics & 13th COLLNET Meeting 25th October 2012 Duckhee Jang(SKAI), Dong-Seong Han(NRF) and Ki-Seok Kwon (KIU)
  2. 2. Contents1.Introduction2.Size, Graduates and Productivity3.Methodology and data4.Results5.Conclusion
  3. 3. 1. IntroductionA number of studies have been conducted untilrecently about what factors bring the differences onthe research productivity (Hess, 1977; Stephan, 1996)According to a variety of previous empiricalresearches, the results show that differentenvironmental, organizational, and humanproperties influence on the research productivityof researchersAn effective procurement of more talented graduatestudents makes more researches conducted in depth.Moreover, research experience is critical for the careermanagement of graduate students
  4. 4. 2. Literature review: size and productivityThe procurement of excellent human resources isthe deterministic factor having higher researchproductivity (Stephan & Levin, 1992)In terms of the correlation between the size andresearch productivity, positive correlation wasnoticed in the small scale at the personal level, andthe highest makes were shown at a certain level atthe departmental level, and the positive correlationwas witnessed in the very small-scale institution atthe institutional level (Von Tunzelmann et al., 2003)
  5. 5. 2. Literature review: graduates and productivityGraduate students play the most important rolesin the research results of universities amonghuman resources of research (Salter etal., 2000) The increase in the number of doctoral students has significantly positive correlation with the professors’ and universities’ productivity (Song, 2001; Kwon, 2010; Ryu & Pae, 2007)
  6. 6. 2. Literature reviewRecent studies on the relationship between the sizeof research groups and the productivity show verycomplicated aspects.The most typical empirical research outcome is thatthe research productivity in small-size groupsincrease as the size increases, yet it shows theopposite result in large-size groups.Also, the optimal research group size is said to be5-9 researchers as verified in various researchfields (Johnston, 1994)
  7. 7. 3. Methodology and dataRegression Model: OLS Category Index Definition and Measurement Pub_1 KCI-Level Research Outcomes Dependent Variable Pub_2 SCI-Level Research OutcomesIndependent Variable Number of Graduate Students Number of Graduate Students Gender 1= Dummy of Females Natural Logarithm of Governments scale Grant_gov of grants to research cost Natural Logarithm of the scale of private g Grant_pri rants to research cost Natural Logarithm of the scale of inner gra Grant_inner nts to research cost Control Variable Age Age Age2 Age Squared Nation 1=Dummy of Domestic Doctorates NU 1=Dummy of National/Public Universities Local Regional Dummy Variable Dummy of Medium-Scale Classification o Cur f Fields of Study
  8. 8. 3. Methodology and dataData is from ‘A study on academic research anddevelopment activities in Korea’ in 2009, which NRFcarries out every year aimed at four-year universities. Descriptive statistics: academics in four fields Discipline Frequency % Humanities 8,955 23.47 Social Sciences 12,807 33.57 Natural Sciences 5,513 14.45 Engineering 10,874 28.5 Total 38,149 100
  9. 9. 4. ResultsDescriptive statistics: size of graduate students Variation Discipline Frequency Average S.D. CoefficientHumanities 8,955 1.057 0.050 4.730 Social 12,807 1.920 0.054 2.813 Sciences Natural 5,513 5.415 0.147 2.715 SciencesEngineering 10,874 7.346 0.122 1.661
  10. 10. T-test results by gender and region Gender Region Discipline Group Obs. Mean Group Obs. Mean Male 6,780 1.186(0.063) Non-Metropolitan Area 4,722 0.881(0.062) Female 2,175 0.654(0.069) Metropolitan Area 4,233 1.253(0.082) Humanities combined 8,955 1.057(0.050) combined 8,955 1.057(0.050) diff 0.532(0.118) diff -0.372(0.101) t-value 4.5275** t-value -3.6778** Male 10,683 1.937(0.059) Non-Metropolitan Area 7,108 1.665(0.067) Female 2,124 1.834(0.131) Metropolitan Area 5,699 2.238(0.087) Social combined 12,807 1.92(0.054) combined 12,807 1.92(0.054) Sciences diff 0.102(0.145) diff -0.573(0.108) t-value 0.7069 t-value -5.2854** Male 4,385 5.752(0.170) Non-Metropolitan Area 3,406 5.257(0.182) Female 1,128 4.105(0.278) Metropolitan Area 2,107 5.671(0.248) Natural combined 5,513 5.415(0.147) combined 5,513 5.415(0.147) Sciences diff 1.648(0.363) diff -0.414(0.302) t-value 4.5351** t-value -1.3709 Male 10,466 7.419(0.125) Non-Metropolitan Area 7,083 7.328(0.148) Female 408 5.478(0.526) Metropolitan Area 3,791 7.38(0.214) Engineering combined 10,874 7.346(0.122) combined 10,874 7.346(0.122) diff 1.941(0.640) diff -0.053(0.255) t-value 3.0336** t-value -0.2070
  11. 11. Regression results: the estimation of KCI papers by OLS Variable Total Humanities Social Sciences Natural Sciences Engineering 0.002** 0.002 0.004** 0.002** 0.003** # of Graduate Students (0.0001) (0.001) (0.001) (0.001) (0.0001) 0.008** 0.018** 0.013** 0.001 0.007** lncen (0.001) (0.002) (0.001) (0.001) (0.001) 0.007** 0.013** 0.009** 0.015** 0.005** lnpri (0.001) (0.004) (0.002) (0.002) (0.001) 0.026** 0.036** 0.027** 0.016** 0.019** lninner (0.001) (0.001) (0.001) (0.001) (0.001) -0.043** -0.036** -0.039** -0.079** -0.015 Gender(1=Male) (0.007) (0.011) (0.012) (0.019) (0.025) 0.081** 0.088** 0.079** 0.066** 0.066** age (0.003) (0.005) (0.005) (0.008) (0.006) -0.001** -0.001** -0.001** -0.001** -0.001** age2 0.000 0.000 0.000 (0.0001) (0.0001) 0.025** 0.008** 0.011 0.063** 0.030** nation(1=Domestic Doctorates) (0.005) (0.011) (0.009) (0.013) (0.010) NU(1=National/Public 0.075** 0.075** 0.071** 0.059** 0.070** Universities) (0.006) (0.012) (0.010) (0.014) (0.010) LocalDum(1=Metropolitan 0.001 0.005 0.030** -0.045** -0.017** Area) (0.005) (0.010) (0.009) (0.014) (0.011) Sub-Discipline Included -1.500** -1.744** -1.315** -1.263** -1.213** Intercept (0.072) (0.119) (0.133) (0.205) (0.153) The value of ( ) is Std. Err. **: p<0.01, *: p<0.05
  12. 12. Regression results: the estimation of SCI papers by OLS Variable Total Humanities Social Sciences Natural Sciences Engineering 0.003** 0.0001* 0.001* 0.005** 0.002** Number of Graduate Students (0.0001) (0.0001) (0.0001) (0.001) (0.0001) 0.012** 0.002** 0.004** 0.020 0.015** lncen (0.0001) (0.0001) (0.001) (0.001) (0.001) 0.007** 0.001 0.003** 0.004** 0.009** lnpri (0.001) (0.001) (0.001) (0.002) (0.001) 0.005** 0.001* 0.002** 0.013** 0.009** lninner (0.0001) (0.0001) (0.0001) (0.001) (0.001) 0.025** -0.002 0.017** 0.080** 0.080** Sex(1=Male) (0.005) (0.002) (0.005) (0.018) (0.020) 0.009** 0.000 0.004 0.002** 0.028** age (0.002) (0.001) (0.002) (0.008) (0.005) -0.0001** -0.0001 -0.0001 -0.0001** -0.0001** age2 (0.00001) (0.0001) (0.0001 ) (0.00001) (0.00001) -0.046** -0.005* -0.026** -0.087** -0.090** nation(1=Domestic Doctorates) (0.003) (0.002) (0.004) (0.012) (0.008) 0.027** 0.006** 0.007 0.061** 0.051** NU(1=National/Public Universities) (0.004) (0.002) (0.004) (0.013) (0.009) 0.040** 0.003 0.033** 0.063** 0.072** LocalDum(1=Metropolitan Area) (0.003) (0.002) (0.004) (0.013) (0.009) 0.382** 0.005 0.172** 0.458** 0.921** Sub-Discipline (0.047) (0.023) (0.058) (0.194) (0.126) The value of ( ) is Std. Err. **: p<0.01, *: p<0.05
  13. 13. 5. Summary and discussionMale researchers managed more graduate studentsthan females, and this may be due to the fact thatthe impact of research funding factors which hadfocused on male researchers and the socialtendency that males’ career is more recognizedCapital-area researchers had higher researchsupporting factors compared to non-metro arearesearchers. Also, in terms of managing graduatestudents, metro-area researchers managed moregraduate students
  14. 14. 5. Summary and discussionMost importantly, the size of graduate students wasproved to be the predictor which causes the significantdifferences in the researcher’s performance (both interms of domestic and int’l publications)Research policies are needed to be implemented bymanaging the research projects mostly aiming atresearchers of underrepresented groups, and thesegroups are females, junior professors, and regionalresearchers

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