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Table 5 Regression analysis (dependent variable: citations per article, n = 774, R2 = 0.14, F-statistic: 6.33**)ab

From: Citation counts in transportation research

  Coefficient
KW 0.409 (1.24)
RF 0.480** (7.00)
WA 0.014 (0.85)
WT −0.734** (−2.64)
AN −0.192 (−1.41)
GE 0.343 (0.12)
EN 2.053 (1.05)
NA 2.248 (0.94)
AC 8.864** (2.60)
TR c 8.312* (2.11)
PA c 8.282** (2.51)
PB c 16.836** (5.14)
TS c 12.576** (3.86)
Y 2000 d 4.911 (1.60)
Y 2001 d 7.293* (2.32)
Y 2002 d 8.728** (2.80)
Y 2003 d 3.075 (0.94)
Constant −0.246 (−0.05)
  1. aLevel of significance: * indicates p < 0.05; ** indicates p < 0.01 (two-tailed)
  2. bValues in parentheses are robust t-statistics
  3. cThe reference category is JT
  4. dThe reference year is 2004