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Table 3: Definitions of Intervention Variables
Excel | CSV
| EASTER |
1 in Easter months, 0 otherwise |
Easter effects |
All |
| DAYS |
Trading days per month |
Trading day effects |
All |
| Mar-89 |
1 in 1989:3, 0 otherwise |
Strike in bus mode and
large increase in single-ticket prices |
SMT, 10MT |
| Mar-90 |
1 in 1990:3, 0 otherwise |
Strike in bus mode |
SMT, SBT, 10BT |
| Apr-90 |
1 in 1990:4, 0 otherwise |
Strike in bus mode and
large increase in single-ticket prices |
10MT, 10BT |
| Jan-91 |
1 in 1991:1, 0 otherwise |
Strike in Metro mode and
large increase in single-ticket prices |
SMT |
| Apr-91 |
1 in 1991:4, 0 otherwise |
Strike in Metro mode |
SMT |
| Feb-92 |
1 in 1992:2, 0 otherwise |
Strike in bus mode |
SMT, SBT, 10BT |
| Mar-92 |
1 in 1992:3, 0 otherwise |
Strike in bus mode |
SBT, 10BT |
| Apr-92 |
1 in 1992:4, 0 otherwise |
Consequences of bus strikes |
SBT |
| Jan-98 |
1 from 1998:1, 0 otherwise |
Introduction of the Metrobus ticket |
SMT, SBT |
| Feb-93 |
1 in 1993:2, 0 otherwise |
? |
JTC |
| Apr-93 |
1 in 1993:4, 0 otherwise |
Metro service
interruption |
JTC |
| Apr-93 |
1 in 1993:4, 0 otherwise |
Temporary closing of certain lines |
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| Mar-94 |
1 in 1994:3, 0 otherwise |
? |
TC, JTC |
| Jul-95 |
1 in 1995:7, 0 otherwise |
? |
JTC |
Key: ? = no known explanation for this intervention variable.
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