| Keyword | CPC | PCC | Volume | Score | Length of keyword |
|---|---|---|---|---|---|
| krugman 1991 | 0.16 | 0.5 | 6256 | 15 | 12 |
| krugman | 0.1 | 0.8 | 71 | 4 | 7 |
| 1991 | 0.9 | 1 | 9419 | 26 | 4 |
| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| krugman 1991 | 1.74 | 0.3 | 2017 | 13 |
| krugman 1991a | 0.11 | 0.6 | 3989 | 90 |
| krugman 1992 | 1.69 | 0.5 | 9411 | 22 |
| krugman 1990 | 0.54 | 0.8 | 432 | 10 |
| krugman 1993 | 0.12 | 0.3 | 3876 | 93 |
| krugman 1998 | 1.5 | 0.3 | 1765 | 78 |
| krugman 1999 | 0.31 | 0.2 | 8505 | 41 |
| krugman 1995 | 1.85 | 0.3 | 2946 | 58 |
| krugman 1994 | 0.29 | 1 | 9074 | 82 |
| krugman 1996 | 0.65 | 1 | 140 | 89 |
