I am trying to make an empirical study on the effect of dividend changes on future firm performance. I, therefore, want to regress dividend change on a measure of firm performance, in this case, it is Return on assets. I, however, need to run the regression using the return on assets in one and two years. My regression would like this:
My problem is, therefore, how do I lag my return on assets variable, 1 or more years when I have multiple firms each with a different number of trading days in a year over 20 years. I use the dummy variable to indicate a change in dividend change. fyear is fiscal year and days is the observation day in the fiscal year. My data looks like this:
Code:
reg roai2y divchange if divchange < -.20 & dummy == 1| divchange > .25 & divchange < 5 & dummy == 1
Code:
clear input long datadate double fyear str88 conm double(cshoc prccd) float(divd divchange roai dummy) int days 15160 2001 "A.P. MOLLER - MAERSK A/S A" 372600 82000 . .3636364 .009597253 . 112 15161 2001 "A.P. MOLLER - MAERSK A/S A" 372600 82500 . .3636364 .009597253 . 113 15162 2001 "A.P. MOLLER - MAERSK A/S A" 372600 82500 . .3636364 .009597253 . 114 15165 2001 "A.P. MOLLER - MAERSK A/S A" 372600 81500 . .3636364 .009597253 . 115 15166 2001 "A.P. MOLLER - MAERSK A/S A" 372600 82500 . .3636364 .009597253 . 116 15167 2001 "A.P. MOLLER - MAERSK A/S A" 372600 82500 . .3636364 .009597253 . 117 15168 2001 "A.P. MOLLER - MAERSK A/S A" 372600 82500 . .3636364 .009597253 . 118 15169 2001 "A.P. MOLLER - MAERSK A/S A" 372600 81500 . .3636364 .009597253 . 119 15172 2001 "A.P. MOLLER - MAERSK A/S A" 372600 82000 . .3636364 .009597253 . 120 15174 2001 "A.P. MOLLER - MAERSK A/S A" 372600 80000 . .3636364 .009597253 . 121 15175 2001 "A.P. MOLLER - MAERSK A/S A" 372600 82000 . .3636364 .009597253 . 122 15176 2001 "A.P. MOLLER - MAERSK A/S A" 372600 82500 . .3636364 .009597253 . 123 15180 2001 "A.P. MOLLER - MAERSK A/S A" 372600 81500 . .3636364 .009597253 . 124 15181 2001 "A.P. MOLLER - MAERSK A/S A" 372600 80000 . .3636364 .009597253 . 125 15182 2001 "A.P. MOLLER - MAERSK A/S A" 372600 79000 . .3636364 .009597253 . 126 15183 2001 "A.P. MOLLER - MAERSK A/S A" 372600 80000 . .3636364 .009597253 . 127 15186 2001 "A.P. MOLLER - MAERSK A/S A" 372600 80000 . .3636364 .009597253 . 128 15187 2001 "A.P. MOLLER - MAERSK A/S A" 372600 80500 . .3636364 .009597253 . 129 15188 2001 "A.P. MOLLER - MAERSK A/S A" 372600 82000 . .3636364 .009597253 . 130 15189 2001 "A.P. MOLLER - MAERSK A/S A" 372600 82000 . .3636364 .009597253 . 131 15190 2001 "A.P. MOLLER - MAERSK A/S A" 372600 82000 . .3636364 .009597253 . 132 15193 2001 "A.P. MOLLER - MAERSK A/S A" 372600 80000 . .3636364 .009597253 . 133 15196 2001 "A.P. MOLLER - MAERSK A/S A" 372600 82000 . .3636364 .009597253 . 134 15197 2001 "A.P. MOLLER - MAERSK A/S A" 372600 82000 . .3636364 .009597253 . 135 15200 2001 "A.P. MOLLER - MAERSK A/S A" 372600 83000 . .3636364 .009597253 . 136 15201 2001 "A.P. MOLLER - MAERSK A/S A" 372600 82500 . .3636364 .009597253 . 137 15202 2001 "A.P. MOLLER - MAERSK A/S A" 372600 82500 . .3636364 .009597253 . 138 15207 2001 "A.P. MOLLER - MAERSK A/S A" 372600 80000 . .3636364 .009597253 . 139 15208 2001 "A.P. MOLLER - MAERSK A/S A" 372600 79500 . .3636364 .009597253 . 140 15214 2001 "A.P. MOLLER - MAERSK A/S A" 372600 82000 . .3636364 .009597253 . 141 15215 2001 "A.P. MOLLER - MAERSK A/S A" 372600 77500 . .3636364 .009597253 . 142 15216 2001 "A.P. MOLLER - MAERSK A/S A" 372600 74000 . .3636364 .009597253 . 143 15217 2001 "A.P. MOLLER - MAERSK A/S A" 372600 73200 . .3636364 .009597253 . 144 15218 2001 "A.P. MOLLER - MAERSK A/S A" 372600 75500 . .3636364 .009597253 . 145 15221 2001 "A.P. MOLLER - MAERSK A/S A" 372600 75000 . .3636364 .009597253 . 146 15222 2001 "A.P. MOLLER - MAERSK A/S A" 372600 73500 . .3636364 .009597253 . 147 15223 2001 "A.P. MOLLER - MAERSK A/S A" 372600 76000 . .3636364 .009597253 . 148 15224 2001 "A.P. MOLLER - MAERSK A/S A" 372600 76000 . .3636364 .009597253 . 149 15229 2001 "A.P. MOLLER - MAERSK A/S A" 372600 72000 . .3636364 .009597253 . 150 15231 2001 "A.P. MOLLER - MAERSK A/S A" 372600 72500 . .3636364 .009597253 . 151 15232 2001 "A.P. MOLLER - MAERSK A/S A" 372600 70000 . .3636364 .009597253 . 152 15235 2001 "A.P. MOLLER - MAERSK A/S A" 372600 67000 . .3636364 .009597253 . 153 15236 2001 "A.P. MOLLER - MAERSK A/S A" 372600 65500 . .3636364 .009597253 . 154 15237 2001 "A.P. MOLLER - MAERSK A/S A" 372600 65300 . .3636364 .009597253 . 155 15239 2001 "A.P. MOLLER - MAERSK A/S A" 372600 58500 . .3636364 .009597253 . 156 15242 2001 "A.P. MOLLER - MAERSK A/S A" 372600 61000 . .3636364 .009597253 . 157 15243 2001 "A.P. MOLLER - MAERSK A/S A" 372600 60000 . .3636364 .009597253 . 158 15244 2001 "A.P. MOLLER - MAERSK A/S A" 372600 59500 . .3636364 .009597253 . 159 15245 2001 "A.P. MOLLER - MAERSK A/S A" 372600 59500 . .3636364 .009597253 . 160 15246 2001 "A.P. MOLLER - MAERSK A/S A" 372600 58000 . .3636364 .009597253 . 161 15249 2001 "A.P. MOLLER - MAERSK A/S A" 372600 54000 . .3636364 .009597253 . 162 15250 2001 "A.P. MOLLER - MAERSK A/S A" 372600 55000 . .3636364 .009597253 . 163 15251 2001 "A.P. MOLLER - MAERSK A/S A" 372600 57000 . .3636364 .009597253 . 164 15252 2001 "A.P. MOLLER - MAERSK A/S A" 372600 61000 . .3636364 .009597253 . 165 15253 2001 "A.P. MOLLER - MAERSK A/S A" 372600 62500 . .3636364 .009597253 . 166 15256 2001 "A.P. MOLLER - MAERSK A/S A" 372600 60000 . .3636364 .009597253 . 167 15258 2001 "A.P. MOLLER - MAERSK A/S A" 372600 64500 . .3636364 .009597253 . 168 15259 2001 "A.P. MOLLER - MAERSK A/S A" 372600 66800 . .3636364 .009597253 . 169 15260 2001 "A.P. MOLLER - MAERSK A/S A" 372600 67000 . .3636364 .009597253 . 170 15263 2001 "A.P. MOLLER - MAERSK A/S A" 372600 64000 . .3636364 .009597253 . 171 15266 2001 "A.P. MOLLER - MAERSK A/S A" 372600 65500 . .3636364 .009597253 . 172 15270 2001 "A.P. MOLLER - MAERSK A/S A" 372600 64000 . .3636364 .009597253 . 173 15271 2001 "A.P. MOLLER - MAERSK A/S A" 372600 63000 . .3636364 .009597253 . 174 15272 2001 "A.P. MOLLER - MAERSK A/S A" 372600 65000 . .3636364 .009597253 . 175 15273 2001 "A.P. MOLLER - MAERSK A/S A" 372600 65000 . .3636364 .009597253 . 176 15274 2001 "A.P. MOLLER - MAERSK A/S A" 372600 69500 . .3636364 .009597253 . 177 15278 2001 "A.P. MOLLER - MAERSK A/S A" 372600 66000 . .3636364 .009597253 . 178 15285 2001 "A.P. MOLLER - MAERSK A/S A" 372600 70900 . .3636364 .009597253 . 179 15286 2001 "A.P. MOLLER - MAERSK A/S A" 372600 67000 . .3636364 .009597253 . 180 15287 2001 "A.P. MOLLER - MAERSK A/S A" 372600 67000 . .3636364 .009597253 . 181 15291 2001 "A.P. MOLLER - MAERSK A/S A" 372600 62500 . .3636364 .009597253 . 182 15292 2001 "A.P. MOLLER - MAERSK A/S A" 372600 64700 . .3636364 .009597253 . 183 15293 2001 "A.P. MOLLER - MAERSK A/S A" 372600 67000 . .3636364 .009597253 . 184 15294 2001 "A.P. MOLLER - MAERSK A/S A" 372600 66500 . .3636364 .009597253 . 185 15295 2001 "A.P. MOLLER - MAERSK A/S A" 372600 65000 . .3636364 .009597253 . 186 15298 2001 "A.P. MOLLER - MAERSK A/S A" 372600 65000 . .3636364 .009597253 . 187 15299 2001 "A.P. MOLLER - MAERSK A/S A" 372600 66000 . .3636364 .009597253 . 188 15300 2001 "A.P. MOLLER - MAERSK A/S A" 372600 65000 . .3636364 .009597253 . 189 15301 2001 "A.P. MOLLER - MAERSK A/S A" 372600 66000 . .3636364 .009597253 . 190 15305 2001 "A.P. MOLLER - MAERSK A/S A" 372600 64000 . .3636364 .009597253 . 191 15307 2001 "A.P. MOLLER - MAERSK A/S A" 372600 64000 . .3636364 .009597253 . 192 15308 2001 "A.P. MOLLER - MAERSK A/S A" 372600 65000 . .3636364 .009597253 . 193 15309 2001 "A.P. MOLLER - MAERSK A/S A" 372600 67000 . .3636364 .009597253 . 194 15312 2001 "A.P. MOLLER - MAERSK A/S A" 372600 70000 . .3636364 .009597253 . 195 15313 2001 "A.P. MOLLER - MAERSK A/S A" 372600 68500 . .3636364 .009597253 . 196 15314 2001 "A.P. MOLLER - MAERSK A/S A" 372600 69900 . .3636364 .009597253 . 197 15315 2001 "A.P. MOLLER - MAERSK A/S A" 372600 69500 . .3636364 .009597253 . 198 15316 2001 "A.P. MOLLER - MAERSK A/S A" 372600 69000 . .3636364 .009597253 . 199 15319 2001 "A.P. MOLLER - MAERSK A/S A" 372600 65000 . .3636364 .009597253 . 200 15320 2001 "A.P. MOLLER - MAERSK A/S A" 372600 67000 . .3636364 .009597253 . 201 15321 2001 "A.P. MOLLER - MAERSK A/S A" 372600 68000 . .3636364 .009597253 . 202 15322 2001 "A.P. MOLLER - MAERSK A/S A" 372600 68000 . .3636364 .009597253 . 203 15323 2001 "A.P. MOLLER - MAERSK A/S A" 372600 66000 . .3636364 .009597253 . 204 15326 2001 "A.P. MOLLER - MAERSK A/S A" 372600 64000 . .3636364 .009597253 . 205 15327 2001 "A.P. MOLLER - MAERSK A/S A" 372600 66000 . .3636364 .009597253 . 206 15328 2001 "A.P. MOLLER - MAERSK A/S A" 372600 64500 . .3636364 .009597253 . 207 15329 2001 "A.P. MOLLER - MAERSK A/S A" 372600 64900 . .3636364 .009597253 . 208 15330 2001 "A.P. MOLLER - MAERSK A/S A" 372600 65000 . .3636364 .009597253 . 209 15336 2001 "A.P. MOLLER - MAERSK A/S A" 372600 68000 . .3636364 .009597253 . 210 15337 2001 "A.P. MOLLER - MAERSK A/S A" 372600 69000 . .3636364 .009597253 . 211 end format %d datadate
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