Table 2 Data dictionary.
Variable | Description |
|---|---|
Unique identifiers | |
  Session | Identifies a specific EV charging session, where each row in the dataset represents a single session. |
  User | Identifies a specific electric vehicle owner. A user who charges multiple times can be identified throughout the dataset using this field. |
  Station | Identifies a specific EV charging station which indicates where a given charging session occurred. |
  Location | Identifies a given building or location, operated by the firm, where one or more EV chargers is available. |
Session characteristics | |
  Create stamp | The timestamp at which a charging session was initialized, in YYYY-MM-DD HH:MM:SS format. |
  End stamp | The timestamp at which a charging session was terminated, in YYYY-MM-DD HH:MM:SS format. |
  Charge time | The duration of a charging session measured in hours. |
  Cost | The amount charged for the charging session in dollars, per the price policy implemented by the firm. |
  Total kWh | The total energy use for a given charging session, measured to the nearest hundredth of a kilowatt-hour. |
  Days of week | Binary variables indicating the specific day of week on which a given transaction was logged. |
  Facility type | Maps a given transaction to the type of facility where it took place. Manufacturing facilities correspond to 1, office facilities to 2, research and development to 3, and other to 4. |
User characteristics | |
  Manager vehicle | A binary variable indicating whether the vehicle associated with a given charging session is of the type generally owned by the firm’s managers as a result of a corporate incentive program (1 if manager vehicle, 0 if not). |
  Early adopter | A binary variable indicating whether a given user was an early adopter or late adopter of the EV charging program (1 if early adopter, 0 if late adopter). Early adopters are defined as the first quartile of users to log a charging session, while late adopters are defined as the remaining users. |
  Habitual user | A binary variable indicating whether a user is a casual or habitual user of workplace charging (1 if habitual, 0 if casual). A habitual user is defined as someone who logged more than the median of 19 charging sessions over the course of the data collection period, while a casual user is someone who logged fewer than 19 sessions. |
  Reported zip | A binary variable indicating whether a user self-reported a zip code to the network operator. |
  Platform | The type of device used to register a session. One of Android, iOS, or Web. |
  Distance | The estimated distance in miles from the centroid of a user’s provided zip code to the exact position where the charging station is located. Not all users provided a zip code. |
  Total sessions | The count of total sessions logged by a given user over the course of the observation period. |
