Table 10.1
Descriptive Statistics of the Main Sample (1) First-borns
Total sample Variable
155
Take test (No=1) Average score of three tests Test score of Korea Test score of mat Test score of English Tutoring expenditure (W1,000 Any tutoring (Yes=1 Tutoring hours for Korea Tutoring for Korean (Yes=1) Tutoring hours for math Tutoring for math (Yes=1) Tutoring hours for English Tutoring for English (Yes=1) Prior quality Hours of self-study Age Male (Yes=1) Only child (Yes=1) Number of siblings Parents’ average age Parents’ average education Both parents present (Yes=1) Single father (Yes=1) Single mother (Yes=1) Books at home Family income (W1,000) First-born child (Yes=1) Source: Author’s calculations.
(2) Later-borns
Differences [(1)–(2)]
N
Mean
S.D.
Mean
S.D.
Mean
S.D.
Mean
S.D.
1752 1503 1490 1419 1490 1749 1749 1752 1752 1752 1752 1752 1752 1285 1752 1752 1752 1752 1752 1751 1748 1752 1752 1752 1752 1730 1752
0.134 49.00 49.75 48.97 49.37 285.4 0.778 1.295 0.301 2.464 0.518 1.732 0.410 46.12 11.34 17.74 0.580 0.075 2.192 46.06 12.10 0.922 0.027 0.051 184.1 318.8 0.539
0.341 22.68 25.82 26.33 26.21 341.1 0.416 2.504 0.459 3.136 0.500 2.627 0.492 26.68 10.22 0.517 0.494 0.263 0.663 3.178 2.538 0.269 0.162 0.221 211.3 196.7 0.499
0.135 50.65 51.72 49.22 51.77 323.8 0.830 1.448 0.338 2.746 0.576 1.956 0.473 45.13 11.62 17.72 0.577 0.139 1.997 44.91 12.46 0.921 0.030 0.050 196.0 332.4
0.342 22.36 25.59 26.31 25.86 375.6 0.376 2.607 0.473 3.251 0.495 2.520 0.500 26.18 10.35 0.521 0.494 0.346 0.540 2.816 2.471 0.270 0.170 0.218 217.3 200.9
0.133 47.07 47.42 48.67 46.57 240.5 0.716 1.116 0.258 2.134 0.451 1.471 0.337 47.30 11.01 17.75 0.585 0.000 2.420 47.40 11.68 0.923 0.024 0.053 170.2 302.9
0.339 22.9 25.93 26.36 26.37 289.6 0.451 2.368 0.438 2.963 0.498 2.725 0.473 27.23 10.06 0.512 0.493 0.000 0.719 3.050 2.553 0.266 0.152 0.225 203.2 190.6
0.003 3.571 4.302 0.549 5.195 83.31 0.114 0.331 0.080 0.612 0.125 0.485 0.136 –2.169 0.613 –0.026 –0.008 0.139 –0.423 –2.493 0.781 –0.003 0.006 –0.004 25.75 29.47
0.016 1.170 1.338 1.404 1.356 16.25 0.020 0.120 0.022 0.150 0.024 0.125 0.023 1.493 0.490 0.025 0.024 0.012 0.030 0.140 0.120 0.013 0.008 0.011 10.11 9.465
T-value 0.17 3.05 3.21 0.39 3.83 5.13 5.79 2.76 3.64 4.09 5.24 3.86 5.82 –1.45 1.25 –1.05 –0.34 11.39 –14.05 –17.78 6.48 –0.20 0.79 –0.34 2.55 3.11