The Value of Patience in Online Grocery Shopping
🤖 AI Summary
The COVID-19 pandemic accelerated the growth of online grocery delivery, yet “instant delivery” promises exacerbate urban traffic congestion, carbon emissions, and air pollution—while the trade-off between individual convenience and societal externalities remains poorly quantified. This paper introduces *customer patience*—i.e., willingness to accept longer delivery windows—as a novel lever to mitigate delivery-related externalities. We develop a network-science-informed mathematical model calibrated on over 8 million real-world grocery orders from Dubai. Our analysis reveals a convex relationship between delivery window length and traffic impact: extending the window by just 5 minutes significantly reduces vehicle miles traveled (VMT) and CO₂ emissions; marginal gains diminish beyond 10 minutes. Empirically, this strategy reduces daily VMT by ~30% and lifecycle CO₂ emissions by 20%. The approach offers a scalable, low-intervention pathway toward sustainable last-mile delivery in high-density urban environments.
Application Category
📝 Abstract
Since the COVID-19 pandemic, online grocery shopping has rapidly reshaped consumer behavior worldwide, fueled by ever-faster delivery promises aimed at maximizing convenience. Yet, this growth has also substantially increased urban traffic congestion, emissions, and pollution. Despite extensive research on urban delivery optimization, little is known about the trade-off between individual convenience and these societal costs. In this study, we investigate the value of marginal extensions in delivery times, termed customer patience, in mitigating the traffic burden caused by grocery deliveries. We first conceptualize the problem and present a mathematical model that highlights a convex relationship between patience and traffic congestion. The theoretical predictions are confirmed by an extensive, network-science based analysis leveraging two large-scale datasets encompassing over 8 million grocery orders in Dubai. Our findings reveal that allowing just five additional minutes in delivery time reduces daily delivery mileage by approximately 30 percent and life-cycle CO2 emissions by 20 percent. Beyond ten minutes of added patience, however, marginal benefits diminish significantly. These results highlight that modest increases in consumer patience can deliver substantial gains in traffic reduction and sustainability, offering a scalable strategy to balance individual convenience with societal welfare in urban delivery systems.
Problem
Research questions and friction points this paper is trying to address.
Investigating trade-offs between delivery convenience and societal costs
Modeling how customer patience reduces urban traffic congestion
Quantifying environmental benefits of extended grocery delivery times
Innovation
Methods, ideas, or system contributions that make the work stand out.
Modeling customer patience to reduce delivery traffic
Analyzing large-scale grocery order data with network science
Extending delivery time by five minutes cuts emissions
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