Cross-sectional regression analysis of cumulative abnormal returns
| Variables | Pre-event days | Event days | Post-event days | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| (−30, 0) | (−15, 0) | (−10, 0) | (−5, 0) | (−1, 0) | (0, 0) | (0, +1) | (0, +5) | (0, +10) | (0, +15) | (0, +30) | |
| NATO | 0.00190 | 0.00306 | −0.02991* | 0.00680 | 0.03064 | 0.03862** | 0.01978 | 0.02555 | 0.09467*** | 0.05943** | 0.08055*** |
| (0.57) | (0.28) | (−1.95) | (0.39) | (1.64) | (2.06) | (1.03) | (1.25) | (4.31) | (2.36) | (2.89) | |
| SIZE | −0.00011 | 0.00349** | 0.00152 | 0.00407 | 0.00453 | 0.00526* | 0.00378 | 0.00523* | 0.00105 | −0.00122 | −0.00283 |
| (−0.26) | (2.11) | (0.65) | (1.50) | (1.49) | (1.72) | (1.27) | (1.68) | (0.29) | (−0.30) | (−0.61) | |
| BSIZE | 0.00017 | −0.00291** | −0.00274* | −0.00330** | −0.00337* | −0.00245 | −0.00420** | −0.00244 | −0.00458** | −0.00617*** | −0.00557** |
| (0.51) | (−2.51) | (−1.94) | (−2.05) | (−1.92) | (−1.35) | (−2.40) | (−1.31) | (−2.12) | (−2.79) | (−2.09) | |
| INF | 0.00029 | 0.00411** | 0.00250 | 0.00287* | 0.00401* | 0.00167 | 0.00205 | 0.00172 | 0.00460** | 0.00488** | 0.00321 |
| (0.72) | (2.44) | (1.39) | (1.70) | (1.89) | (0.90) | (1.13) | (0.87) | (2.10) | (2.01) | (1.16) | |
| GDP | 0.00002 | 0.00030 | 0.00061 | 0.00065 | 0.00081* | 0.00085* | 0.00078* | 0.00122** | 0.00135*** | 0.00080 | 0.00115 |
| (0.54) | (1.23) | (1.59) | (1.49) | (1.74) | (1.96) | (1.67) | (2.42) | (2.71) | (1.26) | (1.59) | |
| Constant | 0.00261 | −0.07630* | −0.02010 | −0.08703 | −0.10451 | −0.11418 | −0.06351 | −0.08160 | 0.00793 | 0.06538 | 0.10013 |
| (0.23) | (−1.74) | (−0.31) | (−1.18) | (−1.26) | (−1.41) | (−0.79) | (−0.97) | (0.08) | (0.59) | (0.80) | |
| Obs. | 1,511 | 1,511 | 1,511 | 1,511 | 1,511 | 1,511 | 1,511 | 1,511 | 1,511 | 1,511 | 1,511 |
| R Square | 0.0012 | 0.0092 | 0.0056 | 0.0058 | 0.0108 | 0.0109 | 0.0083 | 0.0105 | 0.0339 | 0.0183 | 0.0240 |
| Variables | Pre-event days | Event days | Post-event days | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| (−30, 0) | (−15, 0) | (−10, 0) | (−5, 0) | (−1, 0) | (0, 0) | (0, +1) | (0, +5) | (0, +10) | (0, +15) | (0, +30) | |
| NATO | 0.00190 | 0.00306 | −0.02991* | 0.00680 | 0.03064 | 0.03862** | 0.01978 | 0.02555 | 0.09467*** | 0.05943** | 0.08055*** |
| (0.57) | (0.28) | (−1.95) | (0.39) | (1.64) | (2.06) | (1.03) | (1.25) | (4.31) | (2.36) | (2.89) | |
| SIZE | −0.00011 | 0.00349** | 0.00152 | 0.00407 | 0.00453 | 0.00526* | 0.00378 | 0.00523* | 0.00105 | −0.00122 | −0.00283 |
| (−0.26) | (2.11) | (0.65) | (1.50) | (1.49) | (1.72) | (1.27) | (1.68) | (0.29) | (−0.30) | (−0.61) | |
| BSIZE | 0.00017 | −0.00291** | −0.00274* | −0.00330** | −0.00337* | −0.00245 | −0.00420** | −0.00244 | −0.00458** | −0.00617*** | −0.00557** |
| (0.51) | (−2.51) | (−1.94) | (−2.05) | (−1.92) | (−1.35) | (−2.40) | (−1.31) | (−2.12) | (−2.79) | (−2.09) | |
| INF | 0.00029 | 0.00411** | 0.00250 | 0.00287* | 0.00401* | 0.00167 | 0.00205 | 0.00172 | 0.00460** | 0.00488** | 0.00321 |
| (0.72) | (2.44) | (1.39) | (1.70) | (1.89) | (0.90) | (1.13) | (0.87) | (2.10) | (2.01) | (1.16) | |
| GDP | 0.00002 | 0.00030 | 0.00061 | 0.00065 | 0.00081* | 0.00085* | 0.00078* | 0.00122** | 0.00135*** | 0.00080 | 0.00115 |
| (0.54) | (1.23) | (1.59) | (1.49) | (1.74) | (1.96) | (1.67) | (2.42) | (2.71) | (1.26) | (1.59) | |
| Constant | 0.00261 | −0.07630* | −0.02010 | −0.08703 | −0.10451 | −0.11418 | −0.06351 | −0.08160 | 0.00793 | 0.06538 | 0.10013 |
| (0.23) | (−1.74) | (−0.31) | (−1.18) | (−1.26) | (−1.41) | (−0.79) | (−0.97) | (0.08) | (0.59) | (0.80) | |
| Obs. | 1,511 | 1,511 | 1,511 | 1,511 | 1,511 | 1,511 | 1,511 | 1,511 | 1,511 | 1,511 | 1,511 |
| 0.0012 | 0.0092 | 0.0056 | 0.0058 | 0.0108 | 0.0109 | 0.0083 | 0.0105 | 0.0339 | 0.0183 | 0.0240 | |
Note(s): CAR = cumulative abnormal return. NATO = a dummy variable that takes one for NATO member countries and 0 otherwise. SIZE = Logarithm of market capitalization. BSIZE = Number of Director. INF = Inflation rate. GDP = GDP per capita. The ordinate represents the event window. ***, **, and * are significant at 1%, 5%, and 10% confidence levels, respectively. The model uses the ordinary least squares (OLS) estimation technique with robust standard errors
Source(s): Elaborated by the authors