Challenges and opportunities in crowdsourced delivery planning and operations - an update. - Savelsbergh, Martin W. P.; Ulmer, Marlin W. (Ann. Oper. Res., 2024)

Accelerating value function approximations for dynamic dial-a-ride problems via dimensionality reductions. - Heitmann, R.-Julius O.; Soeffker, Ninja; Klawonn, Frank; Ulmer, Marlin W.; Mattfeld, Dirk C. (Comput. Oper. Res., 2024)

Adaptive stochastic lookahead policies for dynamic multi-period purchasing and inventory routing. - Cuellar-Usaquén, Daniel; Ulmer, Marlin W.; Gomez, Camilo; Álvarez-Martínez, David (Eur. J. Oper. Res., 2024)

Balancing resources for dynamic vehicle routing with stochastic customer requests. - Soeffker, Ninja; Ulmer, Marlin W.; Mattfeld, Dirk C. (OR Spectr., 2024)

Consistent routing for local same-day delivery via micro-hubs. - Ackva, Charlotte; Ulmer, Marlin W. (OR Spectr., 2024)

Heatmap-Based Decision Support for Repositioning in Ride-Sharing Systems. - Haferkamp, Jarmo; Ulmer, Marlin W.; Ehmke, Jan Fabian (Transp. Sci., 2024)

Optimal Service Time Windows. - Ulmer, Marlin W.; Goodson, Justin C.; Thomas, Barrett W. (Transp. Sci., 2024)

Online Assignment of a Heterogeneous Fleet in Urban Delivery. - Hermanns, Jeannette Anna Lena; Mattfeld, Dirk C.; Ulmer, Marlin W. (2024)

The Restaurant Meal Delivery Problem with Ghost Kitchens. - Neria, Gal; Hildebrandt, Florentin D.; Tzur, Michal; Ulmer, Marlin W. (CoRR, 2024)

Learning State-Dependent Policy Parametrizations for Dynamic Technician Routing with Rework. - Stein, Jonas; Hildebrandt, Florentin D.; Thomas, Barrett W.; Ulmer, Marlin W. (CoRR, 2024)

Opportunities for reinforcement learning in stochastic dynamic vehicle routing. - Hildebrandt, Florentin D.; Thomas, Barrett W.; Ulmer, Marlin W. (Comput. Oper. Res., 2023)

Combining value function approximation and multiple scenario approach for the effective management of ride-hailing services. - Heitmann, R.-Julius O.; Soeffker, Ninja; Ulmer, Marlin W.; Mattfeld, Dirk C. (EURO J. Transp. Logist., 2023)

Same-day delivery with fair customer service. - Chen, Xinwei; Wang, Tong; Thomas, Barrett W.; Ulmer, Marlin W. (Eur. J. Oper. Res., 2023)

Dynamic priority rules for combining on-demand passenger transportation and transportation of goods. - Bosse, Alexander; Ulmer, Marlin W.; Manni, Emanuele; Mattfeld, Dirk C. (Eur. J. Oper. Res., 2023)

Robotized sorting systems: Large-scale scheduling under real-time conditions with limited lookahead. - Boysen, Nils; Schwerdfeger, Stefan; Ulmer, Marlin W. (Eur. J. Oper. Res., 2023)

Challenges and opportunities in crowdsourced delivery planning and operations. - Savelsbergh, Martin W. P.; Ulmer, Marlin W. (4OR, 2022)

Stochastic dynamic vehicle routing in the light of prescriptive analytics: A review. - Soeffker, Ninja; Ulmer, Marlin W.; Mattfeld, Dirk C. (Eur. J. Oper. Res., 2022)

Deep Q-learning for same-day delivery with vehicles and drones. - Chen, Xinwei; Ulmer, Marlin W.; Thomas, Barrett W. (Eur. J. Oper. Res., 2022)

Preface: Special issue on the future of city logistics and urban mobility. - Kaspi, Mor; Raviv, Tal; Ulmer, Marlin W. (Networks, 2022)

Directions for future research on urban mobility and city logistics. - Kaspi, Mor; Raviv, Tal; Ulmer, Marlin W. (Networks, 2022)

Dynamic service area sizing in urban delivery. - Ulmer, Marlin W.; Erera, Alan L.; Savelsbergh, Martin W. P. (OR Spectr., 2022)

Supervised Learning for Arrival Time Estimations in Restaurant Meal Delivery. - Hildebrandt, Florentin D.; Ulmer, Marlin W. (Transp. Sci., 2022)

Supplier Menus for Dynamic Matching in Peer-to-Peer Transportation Platforms. - Ausseil, Rosemonde; Pazour, Jennifer A.; Ulmer, Marlin W. (Transp. Sci., 2022)

Decision Support for Agri-Food Supply Chains in the E-Commerce Era: The Inbound Inventory Routing Problem with Perishable Products. - Cuellar-Usaquén, Daniel; Gomez, Camilo; Ulmer, Marlin W.; Álvarez-Martínez, David (2022)

The Restaurant Meal Delivery Problem: Dynamic Pickup and Delivery with Deadlines and Random Ready Times. - Ulmer, Marlin W.; Thomas, Barrett W.; Campbell, Ann Melissa; Woyak, Nicholas (Transp. Sci., 2021)

Where the Action is: Let's make Reinforcement Learning for Stochastic Dynamic Vehicle Routing Problems work! - Hildebrandt, Florentin D.; Thomas, Barrett W.; Ulmer, Marlin W. (CoRR, 2021)

Horizontal combinations of online and offline approximate dynamic programming for stochastic dynamic vehicle routing. - Ulmer, Marlin W. (Central Eur. J. Oper. Res., 2020)

On modeling stochastic dynamic vehicle routing problems. - Ulmer, Marlin W.; Goodson, Justin C.; Mattfeld, Dirk C.; Thomas, Barrett W. (EURO J. Transp. Logist., 2020)

Meso-parametric value function approximation for dynamic customer acceptances in delivery routing. - Ulmer, Marlin W.; Thomas, Barrett W. (Eur. J. Oper. Res., 2020)

Binary driver-customer familiarity in service routing. - Ulmer, Marlin W.; Nowak, Maciek; Mattfeld, Dirk C.; Kaminski, Bogumil (Eur. J. Oper. Res., 2020)

Building Trust in Home Services - Stochastic Team-Orienteering with Consistency Constraints. - Song, Yongjia; Ulmer, Marlin W.; Thomas, Barrett W.; Wallace, Stein W. (Transp. Sci., 2020)

Dynamic Pricing and Routing for Same-Day Delivery. - Ulmer, Marlin W. (Transp. Sci., 2020)

Workforce Scheduling in the Era of Crowdsourced Delivery. - Ulmer, Marlin W.; Savelsbergh, Martin W. P. (Transp. Sci., 2020)

Same-Day Delivery with Fairness. - Chen, Xinwei; Wang, Tong; Thomas, Barrett W.; Ulmer, Marlin W. (CoRR, 2020)

Adaptive State Space Partitioning for Dynamic Decision Processes. - Soeffker, Ninja; Ulmer, Marlin W.; Mattfeld, Dirk C. (Bus. Inf. Syst. Eng., 2019)

Dynamic Lookahead Policies for Stochastic-Dynamic Inventory Routing in Bike Sharing Systems. - Brinkmann, Jan; Ulmer, Marlin W.; Mattfeld, Dirk C. (Comput. Oper. Res., 2019)

Same-Day delivery with pickup stations and autonomous vehicles. - Ulmer, Marlin W.; Streng, Sebastian (Comput. Oper. Res., 2019)

Preemptive depot returns for dynamic same-day delivery. - Ulmer, Marlin W.; Thomas, Barrett W.; Mattfeld, Dirk C. (EURO J. Transp. Logist., 2019)

Anticipation versus reactive reoptimization for dynamic vehicle routing with stochastic requests. - Ulmer, Marlin W. (Networks, 2019)

Offline-Online Approximate Dynamic Programming for Dynamic Vehicle Routing with Stochastic Requests. - Ulmer, Marlin W.; Goodson, Justin C.; Mattfeld, Dirk C.; Hennig, Marco (Transp. Sci., 2019)

Enough Waiting for the Cable Guy - Estimating Arrival Times for Service Vehicle Routing. - Ulmer, Marlin W.; Thomas, Barrett W. (Transp. Sci., 2019)

Deep Q-Learning for Same-Day Delivery with a Heterogeneous Fleet of Vehicles and Drones. - Chen, Xinwei; Ulmer, Marlin W.; Thomas, Barrett W. (CoRR, 2019)

Value function approximation for dynamic multi-period vehicle routing. - Ulmer, Marlin W.; Soeffker, Ninja; Mattfeld, Dirk C. (Eur. J. Oper. Res., 2018)

Same-day delivery with heterogeneous fleets of drones and vehicles. - Ulmer, Marlin W.; Thomas, Barrett W. (Networks, 2018)

Budgeting Time for Dynamic Vehicle Routing with Stochastic Customer Requests. - Ulmer, Marlin W.; Mattfeld, Dirk C.; Köster, Felix (Transp. Sci., 2018)

On the Value and Challenge of Real-Time Information in Dynamic Dispatching of Service Vehicles. - Ulmer, Marlin W.; Heilig, Leonard; Voß, Stefan (Bus. Inf. Syst. Eng., 2017)

Delivery Deadlines in Same-Day Delivery. - Ulmer, Marlin W. (Logist. Res., 2017)

Anticipation in Dynamic Vehicle Routing. - Ulmer, Marlin W. (2017)

Risk-Averse Anticipation for Dynamic Vehicle Routing. - Ulmer, Marlin W.; Voß, Stefan (2016)

Problem-Specific State Space Partitioning for Dynamic Vehicle Routing Problems. - Soeffker, Ninja; Ulmer, Marlin W.; Mattfeld, Dirk C. (2016)