Yahoo Category
Size Over Time - Raw Data
"The Internet Is Becoming a Mall"? An Empirical
Investigation Through Web Directories
| 1997 | 1998 | 1999 | 2000 | 2001 | 2002 | |
| Arts |
18229
|
36229
|
50343
|
72657
|
72704
|
89439
|
| Business and Economy |
177970
|
315812
|
452610
|
637107
|
644634
|
734013
|
| Computers and Internet |
17791
|
25712
|
23189
|
22058
|
22039
|
22792
|
| Education |
4827
|
6522
|
7170
|
77198
|
77410
|
85656
|
| Entertainment |
50811
|
75851
|
91511
|
121232
|
125523
|
140262
|
| Government |
7284
|
15275
|
19612
|
28099
|
28043
|
29411
|
| Health |
8685
|
16611
|
19267
|
19936
|
20766
|
25547
|
| News and Media |
11370
|
17770
|
17447
|
53521
|
62934
|
70338
|
| Recreation |
32638
|
61581
|
114534
|
134981
|
157198
|
255836
|
| Reference |
1752
|
2568
|
4692
|
6184
|
6208
|
7290
|
| Regional |
279349
|
308011
|
385246
|
7932
|
8151
|
9803
|
| Science |
19029
|
29373
|
37704
|
43082
|
43967
|
46536
|
| Social Science |
3823
|
7426
|
9842
|
11329
|
11721
|
13817
|
| Society and Culture |
22103
|
123537
|
109582
|
118586
|
121281
|
126700
|
Data anomalies: The increase in size of the Education category in 2000 reflects the addition of listings of specific K12 schools during 1999. The fall in the 2000 size of the Regional category reflects the transfer of most country-specific sites to a separate hierarchy during 1999.
Category sizes over time, relative to 1997 category sizes
| 1997 | 1998 | 1999 | 2000 | 2001 | 2002 | |
| Arts |
1.000
|
1.987
|
2.762
|
3.986
|
3.986
|
4.906
|
| Business and Economy |
1.000
|
1.775
|
2.543
|
3.580
|
3.622
|
4.124
|
| Computers and Internet |
1.000
|
1.445
|
1.303
|
1.240
|
1.239
|
1.281
|
| Education |
1.000
|
1.351
|
1.485
|
15.993
|
16.037
|
17.745
|
| Entertainment |
1.000
|
1.493
|
1.801
|
2.386
|
2.470
|
2.760
|
| Government |
1.000
|
2.097
|
2.692
|
3.858
|
3.850
|
4.038
|
| Health |
1.000
|
1.913
|
2.218
|
2.295
|
2.391
|
2.942
|
| News and Media |
1.000
|
1.563
|
1.534
|
4.707
|
5.535
|
6.186
|
| Recreation |
1.000
|
1.887
|
3.509
|
4.136
|
4.816
|
7.839
|
| Reference |
1.000
|
1.466
|
2.678
|
3.530
|
3.543
|
4.161
|
| Regional |
1.000
|
1.103
|
1.379
|
0.028
|
0.029
|
0.035
|
| Science |
1.000
|
1.544
|
1.981
|
2.264
|
2.311
|
2.446
|
| Social Science |
1.000
|
1.942
|
2.574
|
2.963
|
3.066
|
3.614
|
| Society and Culture |
1.000
|
5.589
|
4.958
|
5.365
|
5.487
|
5.732
|
Category sizes over time, year-over-year (relative to prior year)
| 1998 | 1999 | 2000 | 2001 | 2002 | |
| Arts |
1.987
|
1.390
|
1.443
|
1.001
|
1.230
|
| Business and Economy |
1.775
|
1.433
|
1.408
|
1.012
|
1.139
|
| Computers and Internet |
1.445
|
0.902
|
0.951
|
0.999
|
1.034
|
| Education |
1.351
|
1.099
|
10.767
|
1.003
|
1.107
|
| Entertainment |
1.493
|
1.206
|
1.325
|
1.035
|
1.117
|
| Government |
2.097
|
1.284
|
1.433
|
0.998
|
1.049
|
| Health |
1.913
|
1.160
|
1.035
|
1.042
|
1.230
|
| News and Media |
1.563
|
0.982
|
3.068
|
1.176
|
1.118
|
| Recreation |
1.887
|
1.860
|
1.179
|
1.165
|
1.627
|
| Reference |
1.466
|
1.827
|
1.318
|
1.004
|
1.174
|
| Regional |
1.103
|
1.251
|
0.021
|
1.028
|
1.203
|
| Science |
1.544
|
1.284
|
1.143
|
1.021
|
1.058
|
| Social Science |
1.942
|
1.325
|
1.151
|
1.035
|
1.179
|
| Society and Culture |
5.589
|
0.887
|
1.082
|
1.023
|
1.045
|