Introduction
AI and marketing
Guiding framework and hypotheses
Research approach
Data
Empirical research design
Results
Validation of AI variable
R&D/Asset | p-value | SGA/Asset | p-value | |
---|---|---|---|---|
Quintile 1 | 0.060 | 0.276 | ||
Quintile 2 | 0.058 | 0.322 | ||
Quintile 3 | 0.056 | 0.340 | ||
Quintile 4 | 0.067 | 0.371 | ||
Quintile 5 | 0.087 | 0.403 | ||
Difference in mean t-test between Quintiles | ||||
1 and 2 | 1.276 | 0.899 | -4.072 | 0.000 |
1 and 3 | 3.580 | 0.898 | -5.571 | 0.000 |
1 and 4 | -2.198 | 0.014 | -7.862 | 0.000 |
1 and 5 | -7.992 | 0.000 | -10.525 | 0.000 |
2 and 3 | 0.800 | 0.788 | -1.516 | 0.064 |
2 and 4 | -2.697 | 0.004 | -3.911 | 0.000 |
2 and 5 | -8.552 | 0.000 | -6.476 | 0.000 |
3 and 4 | -3.660 | 0.000 | -2.423 | 0.000 |
3 and 5 | -9.793 | 0.000 | -4.946 | 0.000 |
4 and 5 | -5.016 | 0.000 | -2.206 | 0.013 |
Descriptive statistics
N | P25 | Mean | Median | P75 | SD | t-test | |
---|---|---|---|---|---|---|---|
Consumer Non-Durables | 796 | 0.0022 | 0.0065 | 0.0038 | 0.0075 | 0.0086 | -13.119*** |
Consumer Durable | 605 | 0.0023 | 0.0101 | 0.0046 | 0.0098 | 0.0192 | -8.096*** |
Manufacturing | 2254 | 0.0028 | 0.0111 | 0.0052 | 0.0104 | 0.0206 | -13.042*** |
Oil, Gas, and Coal | 1445 | 0.0026 | 0.0115 | 0.0048 | 0.0083 | 0.0257 | -9.948*** |
Chemicals and Allied | 597 | 0.0022 | 0.0064 | 0.0041 | 0.0078 | 0.0065 | -11.430*** |
Business Equipment | 5630 | 0.0043 | 0.0196 | 0.0092 | 0.0211 | 0.0280 | |
Telephone and Television | 492 | 0.0019 | 0.0061 | 0.0033 | 0.0070 | 0.0106 | -10.590*** |
Utilities | 1206 | 0.0009 | 0.0035 | 0.0020 | 0.0043 | 0.0047 | -19.901*** |
Wholesale, Retail | 1543 | 0.0026 | 0.0081 | 0.0047 | 0.0087 | 0.0123 | -15.682*** |
Healthcare, Medical | 2705 | 0.0021 | 0.0084 | 0.0041 | 0.0088 | 0.0124 | -19.908*** |
Finance | 8032 | 0.0035 | 0.0100 | 0.0065 | 0.0126 | 0.0113 | -27.664*** |
Mines, Constructions | 2716 | 0.0025 | 0.0096 | 0.0049 | 0.0101 | 0.0149 | -17.377*** |
Year | N | P25 | Mean | Median | P75 | SD |
---|---|---|---|---|---|---|
2005 | 1254 | 0.0032 | 0.0120 | 0.0061 | 0.0131 | 0.0184 |
2006 | 1313 | 0.0031 | 0.0116 | 0.0059 | 0.0126 | 0.0183 |
2007 | 1373 | 0.0030 | 0.0116 | 0.0058 | 0.0123 | 0.0182 |
2008 | 1531 | 0.0028 | 0.0108 | 0.0053 | 0.0111 | 0.0183 |
2009 | 1555 | 0.0029 | 0.0110 | 0.0054 | 0.0110 | 0.0183 |
2010 | 1633 | 0.0028 | 0.0109 | 0.0055 | 0.0109 | 0.0189 |
2011 | 1733 | 0.0028 | 0.0107 | 0.0054 | 0.0110 | 0.0184 |
2012 | 1832 | 0.0028 | 0.0108 | 0.0055 | 0.0113 | 0.0180 |
2013 | 1982 | 0.0028 | 0.0108 | 0.0053 | 0.0109 | 0.0183 |
2014 | 2073 | 0.0028 | 0.0107 | 0.0055 | 0.0113 | 0.0179 |
2015 | 2109 | 0.0028 | 0.0109 | 0.0054 | 0.0110 | 0.0179 |
2016 | 2175 | 0.0028 | 0.0108 | 0.0056 | 0.0122 | 0.0166 |
2017 | 2359 | 0.0028 | 0.0115 | 0.0056 | 0.0130 | 0.0181 |
2018 | 2389 | 0.0028 | 0.0135 | 0.0063 | 0.0145 | 0.0217 |
2019 | 1494 | 0.0019 | 0.0102 | 0.0045 | 0.0109 | 0.0178 |
N | P25 | Mean | Median | P75 | Std. Dev | |
---|---|---|---|---|---|---|
Sales/Asset | 27,808 | .113 | .715 | .518 | 1.006 | .763 |
NI/Sales | 27,040 | -.011 | -.724 | .058 | .139 | 4.478 |
NI/30% of SGA | 23,584 | -.445 | .878 | .894 | 2.07 | 5.788 |
ADV/Asset | 27,828 | 0 | .008 | 0 | .002 | .024 |
Ln(Emp) | 27,321 | .185 | 1.324 | .849 | 2.141 | 1.35 |
Sales/Emp | 26,655 | 181.672 | 524.61 | 281.084 | 514.236 | 800.057 |
NI/Emp | 26,655 | -6.364 | -23.145 | 15.681 | 48.248 | 320.583 |
AI | 28,021 | .003 | .011 | .006 | .012 | .018 |
Size | 27,854 | 5.517 | 6.92 | 7.183 | 8.701 | 2.598 |
Growth | 28,021 | 1.096 | 6.414 | 1.945 | 3.965 | 12.861 |
Lev | 28,021 | .047 | .738 | .183 | .375 | 3.629 |
Liquidity | 27,357 | .018 | .127 | .059 | .164 | .171 |
Tangible | 22,451 | .117 | .452 | .295 | .686 | .453 |
Intangible | 27,633 | .005 | .128 | .043 | .138 | .272 |
Risk | 26,243 | .278 | 1.261 | .586 | 1.285 | 2.187 |
HHI | 28,021 | .043 | .182 | .065 | .205 | .245 |
Variables | (1) | (2) | (3) | (4) | (5) | (6) | (7) | (8) |
---|---|---|---|---|---|---|---|---|
(1) AI | 1.000 | |||||||
(2) Sales/Asset | 0.029*** | 1.000 | ||||||
(3) NI/Sales | 0.010* | 0.114*** | 1.000 | |||||
(4) NI/Inv | -0.015** | 0.015** | 0.090*** | 1.000 | ||||
(5) ADV/Asset | -0.005 | 0.252*** | -0.004 | -0.046*** | 1.000 | |||
(6) Ln(Emp) | -0.044*** | 0.225*** | 0.166*** | 0.095*** | 0.077*** | 1.000 | ||
(7) Sales/Emp | -0.109*** | -0.010* | 0.102*** | 0.189*** | -0.054*** | -0.083*** | 1.000 | |
(8) NI/Emp | 0.011* | 0.063*** | 0.487*** | 0.516*** | -0.003 | 0.163*** | 0.260*** | 1.000 |
Quintile 1 | Quintile 2 | Quintile 3 | Quintile 4 | Quintile 5 | Difference in mean between Quintiles 1 & 5 | p-value | |
---|---|---|---|---|---|---|---|
Sales/Asset | 0.700 | 0.748 | 0.730 | 0.692 | 0.703 | -0.244 | 0.403 |
NI/Sales | -0.932 | -0.821 | -0.678 | -0.608 | -0.584 | -3.959 | 0.000 |
NI/30% of SGA | 0.869 | 0.909 | 0.781 | 0.912 | 0.911 | -0.343 | 0.365 |
ADV/Sales | 0.009 | 0.008 | 0.008 | 0.007 | 0.006 | 5.699 | 0.000 |
Ln(Emp) | 1.555 | 1.352 | 1.304 | 1.202 | 1.209 | 13.452 | 0.000 |
Sales/Emp | 771.979 | 589.843 | 510.180 | 416.891 | 341.752 | 26.689 | 0.000 |
NI/Emp | -39.926 | -30.176 | -18.214 | -19.495 | -8.440 | -4.922 | 0.000 |
Main results
(1) | (2) | (3) | (4) | (5) | |
---|---|---|---|---|---|
Variables | ADV/Asset | Ln(Emp) | Sales/Asset | Sales/Emp | NI/30% of SGA |
Ln(Emp) | 0.298*** | ||||
(0.006) | |||||
ADV/Asset | 0.617*** | ||||
(0.189) | |||||
AI | -0.019* | 0.015*** | -0.282 | -1.569*** | 10.337*** |
(0.010) | (0.003) | (0.223) | (0.210) | (1.501) | |
Size | 0.001*** | 0.519*** | -0.197*** | 40.924*** | 0.323*** |
(0.000) | (0.003) | (0.004) | (2.338) | (0.022) | |
Growth | 0.000*** | 0.001 | -0.000 | -1.432** | 0.005 |
(0.000) | (0.001) | (0.001) | (0.607) | (0.006) | |
Lev | 0.000** | -0.003 | 0.002 | -1.388 | -0.001 |
(0.000) | (0.002) | (0.002) | (1.873) | (0.013) | |
Liquidity | 0.013*** | -0.081* | -0.469*** | 62.125* | 1.467*** |
(0.002) | (0.042) | (0.035) | (32.523) | (0.308) | |
Tangible | -0.001 | 0.268*** | -0.033** | -48.142*** | -0.010 |
(0.001) | (0.017) | (0.014) | (12.767) | (0.121) | |
Intangible | 0.025*** | 0.946*** | 0.441*** | -157.499*** | -3.060*** |
(0.001) | (0.031) | (0.027) | (23.994) | (0.223) | |
Risk | -0.001*** | -0.024*** | 0.010*** | 28.912*** | -0.156*** |
(0.000) | (0.003) | (0.002) | (2.206) | (0.016) | |
HHI | 0.100*** | 0.119*** | 57.664*** | 0.384** | |
(0.023) | (0.019) | (17.610) | (0.167) | ||
Sales/Asset | 141.417*** | ||||
(4.450) | |||||
Sales/Emp | 0.001*** | ||||
(0.000) | |||||
Constant | 0.021*** | -1.858*** | 1.938*** | -169.540*** | -0.593* |
(0.002) | (0.049) | (0.042) | (37.966) | (0.355) | |
Industry and Year Effect | Included | Included | Included | Included | Included |
Weak Instrument Test (Cragg Donald F-stat) (p-value) | 2029.69 (0.000) | 26,908.13 (0.000) | 2067.69 (0.000) | 2196.24 (0.000) | 196.56 (0.000) |
Observations | 15,553 | 15,553 | 15,553 | 15,553 | 15,553 |
R-squared | 0.119 | 0.739 | 0.377 | 0.285 | 0.089 |
(6) | (7) | (8) | (9) | (10) | |
---|---|---|---|---|---|
Variables | NI/Sales | NI/Emp | AI | AI | AI |
AI | 9.800*** | 5.948*** | |||
(0.737) | (0.233) | ||||
Size | 0.159*** | 15.480*** | -0.802*** | -0.634*** | -0.637*** |
(0.016) | (0.999) | (0.087) | (0.086) | (0.086) | |
Growth | -0.001 | 0.017 | 0.049** | 0.049** | 0.048** |
(0.004) | (0.266) | (0.023) | (0.023) | (0.023) | |
Lev | -0.001 | 0.023 | |||
(0.007) | (0.207) | ||||
Liquidity | -3.177*** | -120.501*** | -1.750 | -2.237* | -3.622*** |
(0.220) | (14.197) | (1.234) | (1.226) | (1.226) | |
Tangible | 0.281*** | -15.226*** | -3.098*** | -3.436*** | -3.339*** |
(0.086) | (5.554) | (0.483) | (0.479) | (0.480) | |
Intangible | -4.616*** | -199.587*** | 4.755*** | 3.721*** | 2.627*** |
(0.158) | (10.119) | (0.878) | (0.872) | (0.873) | |
Risk | -0.073*** | -3.377*** | |||
(0.008) | (0.245) | ||||
HHI | 0.433*** | 38.733*** | 6.800*** | 7.233*** | 7.329*** |
(0.119) | (7.665) | (0.667) | (0.662) | (0.663) | |
Sales/Emp | 0.001*** | 0.055*** | |||
(0.000) | (0.001) | ||||
NI/Emp | 0.013*** | ||||
(0.000) | |||||
NI/Sales | 0.354*** | ||||
(0.000) | |||||
NI/30% of SGA | 0.174*** | ||||
(0.000) | |||||
Constant | -0.683*** | -62.426*** | 9.185*** | 8.648*** | 8.523*** |
(0.254) | (16.361) | (1.422) | (1.412) | (1.413) | |
Industry and Year Effect | Included | Included | Included | Included | Included |
Weak Instrument Test (Cragg Donald F-stat) (p-value) | 652.77 (0.000) | 193.63 (0.000) | 731.18 (0.000) | 731.18 (0.000) | 731.18 (0.000) |
Observations | 15,553 | 15,553 | 15,553 | 15,553 | 15,553 |
R-squared | 0.179 | 0.172 | 0.056 | 0.068 | 0.067 |
Test of weak instruments
Possible self selection bias in sample
Variable | Treatment | Control | p-value of t-test of mean difference between treatment and control sample |
---|---|---|---|
Size | 6.607 | 7.199 | 0.000 |
Growth | 5.506 | 7.225 | 0.000 |
Leverage | 0.736 | 0.736 | 0.931 |
Liquidity | 0.135 | 0.120 | 0.000 |
Tangible | 0.393 | 0.498 | 0.000 |
Intangible | 0.142 | 0.116 | 0.000 |
Risk | 1.003 | 1.501 | 0.000 |
HHI | 0.185 | 0.177 | 0.000 |
AI | 0.020 | 0.003 | 0.000 |
Dependent variable | |
---|---|
High(t) | |
Size(t) | -0.029*** |
(0.000) | |
MTB(t) | 0.003** |
(0.003) | |
Lev(t) | -0.002 |
(0.468) | |
Liquidity(t) | 0.008 |
(0.887) | |
Tangible(t) | -0.158*** |
(0.000) | |
Intangible(t) | 0.062*** |
(0.000) | |
Risk(t) | -0.034*** |
(0.000) | |
HHI(t) | 0.214*** |
Constant | (0.000) -0.254*** (0.001) |
Observations | 20,660 |
Industry and Year Effect | Y |
Pseudo R.2 | 0.060 |
Variable | Treatment | Control | p-value of t-test of mean difference between treatment and control sample |
---|---|---|---|
Size | 6.532 | 6.503 | 0.483 |
Growth | 4.439 | 4.476 | 0.782 |
Leverage | 0.610 | 0.623 | 0.791 |
Liquidity | 0.157 | 0.156 | 0.787 |
Tangible | 0.418 | 0.426 | 0.311 |
Intangible | 0.159 | 0.159 | 0.968 |
Risk | 1.211 | 1.227 | 0.619 |
HHI | 0.224 | 0.227 | 0.570 |
AI | 0.012 | 0.003 | 0.000 |
Fama French industries | Number of observations in treatment sample | Number of observations in control sample |
---|---|---|
Consumer Non-Durables | 229 | 240 |
Consumer Durable | 225 | 235 |
Manufacturing | 920 | 945 |
Oil, Gas and Coal | 511 | 502 |
Chemicals and Allied | 180 | 199 |
Business Equipment | 1,897 | 1,909 |
Telephone and Television | 115 | 106 |
Utilities | 62 | 67 |
Wholesale, Retail | 559 | 535 |
Healthcare, Medical | 920 | 904 |
Finance | 1,057 | 1,033 |
Mines, Constructions | 1,020 | 1,020 |
(1) | (2) | (3) | (4) | (5) | |
---|---|---|---|---|---|
Variables | ADV/Asset | Ln(Emp) | Sales/Asset | Sales/Emp | NI/30% of SGA |
Ln(Emp) | 0.298*** | ||||
(0.007) | |||||
ADV/Asset | 0.852*** | ||||
(0.196) | |||||
AI | -0.019* | 0.014*** | -0.400* | -1.473*** | 8.967*** |
(0.010) | (0.003) | (0.231) | (0.213) | (1.564) | |
Size | 0.001*** | 0.525*** | -0.202*** | 39.027*** | 0.310*** |
(0.000) | (0.003) | (0.004) | (2.418) | (0.023) | |
Growth | 0.001*** | 0.001 | 0.001 | -1.769*** | 0.009 |
(0.000) | (0.001) | (0.001) | (0.638) | (0.006) | |
Lev | 0.001* | -0.005* | 0.001 | -0.537 | -0.003 |
(0.000) | (0.003) | (0.002) | (1.906) | (0.014) | |
Liquidity | 0.013*** | -0.084* | -0.500*** | 71.388** | 1.476*** |
(0.002) | (0.044) | (0.036) | (32.902) | (0.313) | |
Tangible | -0.000 | 0.306*** | -0.036** | -71.314*** | 0.097 |
(0.001) | (0.017) | (0.015) | (13.100) | (0.125) | |
Intangible | 0.025*** | 0.955*** | 0.393*** | -162.963*** | -3.191*** |
(0.001) | (0.033) | (0.028) | (24.875) | (0.233) | |
Risk | -0.000*** | -0.024*** | 0.014*** | 28.223*** | -0.150*** |
(0.000) | (0.003) | (0.003) | (2.475) | (0.018) | |
HHI | 0.089*** | 0.129*** | 82.110*** | 0.328* | |
(0.024) | (0.020) | (18.131) | (0.173) | ||
Sales/Asset | 145.455*** | ||||
(4.442) | |||||
Sales/Emp | 0.001*** | ||||
(0.000) | |||||
Constant | 0.021*** | -1.921*** | 1.970*** | -177.110*** | -0.538 |
(0.002) | (0.050) | (0.044) | (38.449) | (0.362) | |
Industry and Year Effect | Included | Included | Included | Included | Included |
Weak Instrument Test (Cragg Donald F-stat) (p-value) | 2004.65 (0.000) | 25,178.60 (0.000) | 2037.27 (0.000) | 1947.66 (0.000) | 198.75 (0.000) |
Observations | 14,459 | 14,459 | 14,459 | 14,459 | 14,459 |
R-squared | 0.120 | 0.738 | 0.380 | 0.284 | 0.088 |
(6) | (7) | (8) | (9) | (10) | |
---|---|---|---|---|---|
Variables | NI/Sales | NI/Emp | AI | AI | AI |
AI | 8.406*** | 5.364*** | |||
(0.702) | (0.226) | ||||
Size | 0.145*** | 15.466*** | -0.541*** | -0.381*** | -0.381*** |
(0.016) | (1.034) | (0.092) | (0.091) | (0.091) | |
Growth | 0.005 | 0.029 | 0.010 | 0.008 | 0.008 |
(0.004) | (0.278) | (0.025) | (0.025) | (0.025) | |
Lev | -0.001 | -0.022 | |||
(0.006) | (0.202) | ||||
Liquidity | -3.345*** | -128.152*** | -1.312 | -1.816 | -3.092** |
(0.226) | (14.310) | (1.274) | (1.268) | (1.268) | |
Tangible | 0.258*** | -7.118 | -2.307*** | -2.520*** | -2.454*** |
(0.090) | (5.692) | (0.507) | (0.504) | (0.504) | |
Intangible | -4.857*** | -209.470*** | 4.689*** | 3.658*** | 2.577*** |
(0.167) | (10.518) | (0.935) | (0.930) | (0.931) | |
Risk | -0.064*** | -3.174*** | |||
(0.008) | (0.264) | ||||
HHI | 0.415*** | 32.307*** | 6.003*** | 6.345*** | 6.436*** |
(0.124) | (7.872) | (0.702) | (0.698) | (0.698) | |
Sales/Emp | 0.000*** | 0.057*** | |||
(0.000) | (0.001) | ||||
NI/Emp | 0.012*** | ||||
(0.000) | |||||
NI/Sales | 0.317*** | ||||
(0.000) | |||||
NI/30% SGA | 0.143*** | ||||
(0.000) | |||||
Constant | -0.522** | -63.664*** | 7.421*** | 6.851*** | 6.771*** |
(0.261) | (16.523) | (1.471) | (1.464) | (1.465) | |
Industry and Year Effect | Included | Included | Included | Included | Included |
Weak Instrument Test (Cragg Donald F-stat) (p-value) | 626.64 (0.000) | 190.47 (0.000) | 666.73 (0.000) | 666.73 (0.000) | 666.73 (0.000) |
Observations | 14,459 | 14,459 | 14,459 | 14,459 | 14,459 |
R-squared | 0.186 | 0.177 | 0.053 | 0.063 | 0.062 |
Industry weighted measure of AI focus
N | P25 | Mean | Median | P75 | SD | |
---|---|---|---|---|---|---|
Consumer Non-Durables | 728 | 0.173 | 1.244 | 0.444 | 1.270 | 2.389 |
Consumer Durable | 601 | 0.242 | 1.441 | 0.651 | 1.565 | 2.397 |
Manufacturing | 2220 | 0.327 | 1.521 | 0.708 | 1.575 | 2.509 |
Oil, Gas, and Coal | 1439 | 0.371 | 1.639 | 0.885 | 1.541 | 2.673 |
Chemicals and Allied | 586 | 0.389 | 1.312 | 0.823 | 2.000 | 1.484 |
Business Equipment | 5579 | 0.313 | 1.658 | 0.700 | 1.739 | 2.589 |
Telephone and Television | 475 | 0.192 | 0.932 | 0.459 | 1.015 | 1.330 |
Utilities | 1183 | 0.295 | 0.974 | 0.608 | 0.882 | 1.425 |
Wholesale, Retail | 1483 | 0.225 | 1.125 | 0.464 | 1.079 | 1.978 |
Healthcare, Medical | 2630 | 0.154 | 0.858 | 0.316 | 0.692 | 1.898 |
Finance | 7915 | 1.352 | 3.216 | 2.613 | 4.277 | 3.127 |
Mines, Constructions | 2664 | 0.201 | 1.014 | 0.468 | 0.997 | 1.795 |
(1) | (2) | (3) | (4) | (5) | |
---|---|---|---|---|---|
Variables | ADV/Asset | Ln(Emp) | Sales/Asset | Sales/Emp | NI/30% of SGA |
Ln(Emp) | 0.294*** | ||||
(0.006) | |||||
ADV/Asset | 0.758*** | ||||
(0.190) | |||||
WAI | -0.001 | 0.019*** | 0.001 | -0.028*** | -0.032** |
(0.000) | (0.003) | (0.002) | (0.002) | (0.014) | |
Size | 0.001*** | 0.517*** | -0.196*** | 42.292*** | 0.294*** |
(0.000) | (0.003) | (0.004) | (2.386) | (0.022) | |
Growth | 0.000*** | 0.001 | -0.001 | -1.391** | 0.007 |
(0.000) | (0.001) | (0.001) | (0.619) | (0.006) | |
Lev | 0.000** | -0.003 | 0.001 | -0.949 | 0.038*** |
(0.000) | (0.002) | (0.002) | (1.876) | (0.012) | |
Liquidity | 0.013*** | -0.098** | -0.443*** | 57.193* | 1.214*** |
(0.002) | (0.043) | (0.036) | (33.154) | (0.312) | |
Tangible | -0.001 | 0.270*** | -0.034** | -56.267*** | -0.103 |
(0.001) | (0.017) | (0.014) | (13.085) | (0.123) | |
Intangible | 0.024*** | 0.948*** | 0.435*** | -163.893*** | -3.194*** |
(0.001) | (0.032) | (0.027) | (24.614) | (0.226) | |
Risk | -0.000*** | -0.024*** | 0.013*** | 30.406*** | -0.061*** |
(0.000) | (0.003) | (0.002) | (2.257) | (0.014) | |
HHI | 0.069*** | 0.116*** | 104.106*** | 0.498*** | |
(0.024) | (0.020) | (18.415) | (0.171) | ||
Sales/Asset | 137.456*** | ||||
(4.240) | |||||
Sales/Emp | 0.001*** | ||||
(0.000) | |||||
Constant | 0.022*** | -1.880*** | 1.905*** | -151.070*** | -0.452 |
(0.002) | (0.051) | (0.044) | (39.484) | (0.368) | |
Industry and Year Effect | Included | Included | Included | Included | Included |
Weak Instrument Test (Cragg Donald F-stat) (p-value) | 2159.39 (0.000) | 32,078.61 (0.000) | 2157.44 (0.000) | 2290.55 (0.000) | 199.06 (0.000) |
Observations | 15,003 | 15,003 | 15,003 | 15,003 | 15,003 |
R-squared | 0.118 | 0.739 | 0.374 | 0.281 | 0.089 |
(6) | (7) | (8) | (9) | (10) | |
---|---|---|---|---|---|
Variables | NI/Sales | NI/Emp | WAI | WAI | WAI |
WAI | 0.080*** | 0.038*** | |||
(0.006) | (0.004) | ||||
Size | 0.131*** | 14.548*** | 63.234*** | 6.584*** | 7.343*** |
(0.016) | (1.021) | (9.610) | (0.961) | (0.961) | |
Growth | 0.000 | 0.030 | 3.348 | 0.334 | 0.338 |
(0.004) | (0.271) | (2.561) | (0.256) | (0.256) | |
Lev | -0.016*** | -1.036*** | |||
(0.005) | (0.344) | ||||
Liquidity | -3.034*** | -119.556*** | -105.226 | -7.208 | -13.899 |
(0.223) | (14.472) | (137.020) | (13.696) | (13.699) | |
Tangible | 0.250*** | -18.072*** | -474.191*** | -48.803*** | -48.426*** |
(0.088) | (5.683) | (53.720) | (5.369) | (5.371) | |
Intangible | -4.645*** | -196.318*** | 310.810*** | 35.530*** | 19.621** |
(0.160) | (10.418) | (98.105) | (9.806) | (9.808) | |
Risk | -0.003 | -1.148*** | |||
(0.006) | (0.416) | ||||
HHI | 0.395*** | 36.180*** | 1,693.026*** | 169.666*** | 171.729*** |
(0.121) | (7.889) | (74.434) | (7.440) | (7.442) | |
Sales/Emp | 0.000*** | 0.054*** | |||
(0.000) | (0.002) | ||||
NI/Emp | 0.393*** | ||||
(0.000) | |||||
NI/Sales | 2.638*** | ||||
(0.000) | |||||
NI/30% of SGA | -1.108*** | ||||
(0.001) | |||||
Constant | -0.674** | -56.984*** | 100.974 | 9.676 | 7.491 |
(0.263) | (17.065) | (161.562) | (16.149) | (16.152) | |
Industry and Year Effect | |||||
Weak Instrument Test (Cragg Donald F-stat) (p-value) | 634.24 (0.000) | 192.07 (0.000) | 933.31 (0.000) | 933.31 (0.000) | 933.31 (0.000) |
Observations | 15,003 | 15,003 | 15,003 | 15,003 | 15,003 |
R-squared | 0.177 | 0.169 | 0.061 | 0.062 | 0.061 |