Grocery shopping and related access trips by mode in Canadian time use surveys
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Notice bibliographique
Résumé
• Many travel and time use surveys group grocery shopping with all other shopping. • We explore characteristics of grocery shopping and compare with all other shopping. • Grocery shopping sequences are shorter, more car-based, in home to home sequences or returning home. • Nearly half of full grocery shopping activity time is spent traveling to/from. • Grocery shoppers are distinct from shoppers for all other purposes. Grocery shopping episodes are often grouped with other shopping in travel surveys, making it difficult to study these activities. This paper explores grocery shopping trips, shopping episode characteristics and participants, and assesses the potential loss of information stemming from the grouping of all shopping activities. A sample of metropolitan area respondent data from the Canadian General Social Surveys’ 2010 and 2015 (cycles 24 and 29) time use modules is used. In the 2010 survey, grocery shopping and other shopping is surveyed separately, while the 2015 survey merges all shopping activities. This provides an opportunity to compare these approaches. The characteristics of shopping activities (2010 and 2015) with respect to participation, timing, in-store episode time and trip duration, activity sequences (in-store episodes with access/egress trips), and respondents’ demographics are compared using bivariate tests, and logistic regressions. Activity sequences are assessed using two locations before and two locations after shopping episodes. Grocery shopping activity sequences are shorter in duration than other shopping activity sequences. No difference in episode duration is found between gender or income for groceries, while significant differences are found for other shopping. “Home-store-home” by car is the most frequent sequence for all shopping types. Nearly half of the grocery shopping activity sequence is spent on the access and egress trips. In logistic regressions, age, gender, employment, and the most frequent travel mode are associated with having performed shopping episodes, regardless of shopping types. Compared to other shopping episodes, grocery shopping is more strongly associated with being 75 or older, being married, from visible minority groups, and with higher education. Grocery shopping activities differ from other shopping in terms of participant, timing, duration, and activity sequence. Combining grocery shopping and other shopping in future time use surveys (and in travel surveys) may mask the distinctiveness of grocery shopping episodes, trips and overall sequences.
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Prédiction distillée sur la base complète
Imitation des enseignantsNi prévalence calibrée, ni vérité terrain. Validation humaine à venir. Apprise à partir de 10 348 étiquettes directes de Codex et de 10 348 étiquettes directes de Gemma. Le mode candidate est l'union des têtes enseignantes seuillées; le consensus est leur intersection. Ces sorties portent le statut machine_predicted_unvalidated et ne sont ni des étiquettes humaines ni des étiquettes directes de modèles de pointe.
Scores Codex et Gemma par catégorie
| Catégorie | Codex | Gemma |
|---|---|---|
| Métarecherche | 0,001 | 0,000 |
| Méta-épidémiologie (sens strict) | 0,000 | 0,000 |
| Méta-épidémiologie (sens large) | 0,000 | 0,000 |
| Bibliométrie | 0,000 | 0,000 |
| Études des sciences et des technologies | 0,001 | 0,000 |
| Communication savante | 0,000 | 0,001 |
| Science ouverte | 0,000 | 0,000 |
| Intégrité de la recherche | 0,000 | 0,000 |
| Charge utile insuffisante (le modèle a refusé de juger) | 0,000 | 0,000 |
Scores machine (provisoires)
Les deux têtes enseignantes du modèle étudiant, lues sur ce travail. Un score ordonne la base pour la relecture; il n'affirme jamais une catégorie, et le statut de validation accompagne chaque rangée tel quel.
Scores de référence d'un modèle non mature (critères de maturité non atteints, 7 itérations). Un score ordonne; il n'affirme jamais une catégorie.
score_only:v0-immature-baseline · tel quel depuis la passe de notation : score_only signifie que le nombre peut ordonner les travaux, et qu'aucune étiquette de catégorie n'en découle