Category | Variable | Mean | Std | Min | Max |
---|---|---|---|---|---|
Hardness | Number of authors | 6.566 | 10.756 | 1 | 97 |
Number of references | 78.101 | 79.820 | 1 | 8,724 | |
Number of cited disciplines | 5.216 | 2.059 | 1 | 19 | |
Citation distribution | 1.980 | 0.329 | 0 | 2.964 | |
Price index | 0.022 | 0.023 | 0 | 1 | |
Citation dynamic | First citation year | 1.339 | 1.509 | 0 | 5 |
First citation count | 4.990 | 29.901 | 1 | 7,848 | |
First peak year | 2.132 | 2.068 | 0 | 5 | |
First peak Citation count | 10.001 | 33.349 | 1 | 7,848 |
Variable | Model 1 - variety | Model 2 - balance | Model 3 - disparity | ||||
---|---|---|---|---|---|---|---|
B | Sig. | B | Sig. | B | Sig. | VIF | |
Number of authors | -0.006 | 0.745 | 0.016 | 0.411 | 0.026 | 0.411 | 1.935 |
Number of references | 1.700 | 0.000*** | 1.170 | 0.001*** | -1.113 | 0.001*** | 5.672 |
Number of cited disciplines | 2.405 | 0.000*** | 1.992 | 0.000*** | -1.005 | 0.000*** | 4.315 |
Citation distribution | 12.722 | 0.001*** | 7.770 | 0.000*** | -2.160 | 0.000*** | 4.778 |
Price index | 23.584 | 0.001*** | 1.013 | 0.900 | 7..713 | 0.900 | 3.954 |
First citation year | 1.909 | 0.371 | -0.482 | 0.577 | 0.244 | 0.577 | 2.047 |
First citation count | -0.016 | 0.769 | 0.049 | 0.368 | -0.460 | 0.368 | 3.126 |
First peak year | -0.353 | 0.214 | -0.066 | 0.774 | -0.095 | 0.774 | 2.372 |
First peak citation count | -0.004 | 0.912 | -0.069 | 0.026 | 0.610 | 0.026 | 3.579 |
Observations | 291 | 291 | 291 | ||||
Intercept | 29.3 | 12.4 | -3.93 | ||||
R2 | 0.784 | 0.509 | 0.473 |
Variable | Model 4 - variety | Model 5 - balance | Model 6 - disparity | |||
---|---|---|---|---|---|---|
B | Sig. | B | Sig. | B | Sig. | |
Number of authors | -0.011 | 0.708 | 0.015 | 0.392 | 0.027 | 0.337 |
Number of references | 1.577 | 0.000*** | 1.453 | 0.000*** | -1.08 | 0.000*** |
Number of cited disciplines | 2.418 | 0.000*** | 1.987 | 0.000*** | -0.912 | 0.000*** |
Citation distribution | 12.174 | 0.000*** | 7.81 | 0.001*** | -2.35 | 0.000*** |
Price index | 24.548 | 0.001*** | 1.128 | 0.889 | 8.727 | 0.814 |
First citation year | 1.416 | 0.483 | -0.467 | 0.571 | 0.361 | 0.557 |
First citation count | -0.065 | 0.796 | 0.047 | 0.366 | -0.024 | 0.459 |
First peak year | -0.347 | 0.236 | -0.061 | 0.768 | -0.084 | 0.762 |
First peak citation count | -0.017 | 0.816 | -0.0703 | 0.025 | 0.563 | 0.121 |
Observations | 291 | 291 | 291 | |||
Intercept | 27.625 | 10.975 | -3.615 | |||
R2 | 0.786 | 0.522 | 0.470 |
Aspect | Variable | Definition | Key refs. |
---|---|---|---|
Hardness | Number of authors |
The number of authors who wrote the publication. | ( |
Number of references |
The number of references listed in the publication. | ( |
|
Number of cited disciplines |
The number of disciplines corresponding to the references in the publication. | ( |
|
Citation distribution |
The Shannon entropy of disciplines corresponding to the references in the publication. | ( |
|
Price index |
The ratio of citation counts of papers published for no more than five years to total citation counts. | ( |
|
Citation dynamic | First citation year |
The year between the publication of the paper and its first citation. | ( |
First citation count |
Citation counts in the year of its first citation. | ( |
|
First peak year |
The year between the publication of the paper and the first citation peak. | ( |
|
First peak citation count |
Citation counts in the first citation peak. | ( |