Senior Economist

At Expedia Group, we help travelers explore the world, one journey at a time. As a global travel company powered by passionate people, trusted partnerships, and leading technology, we connect travelers, partners, and advertisers through our consumer brands, B2B network, and travel advertising business.Here, you'll do meaningful work that helps millions of people discover, book, and experience travel with more ease, confidence, and joy. Our five Behaviors-Traveler First, Think Big, Operate with Excellence, Ownership Mindset, and Succeed Together-help foster a supportive environment where people can grow their careers and have the flexibility, benefits, and support to do their best work. Join us and build for travelers everywhere.Senior EconomistExpedia Group's Economics and Experimentation Science team is looking for a Senior Economist to drive causal inference and marketplace optimization at scale—impacting billions of dollars in transaction value across one of the world's largest travel platforms.  You'll tackle high-stakes problems, including measuring incrementality in two-sided marketplaces, quantifying long-term value of customer behavior signals, and designing quasi-experimental methods to evaluate product changes that can't be measured using A/B testing techniques. Your work will directly shape how Expedia Group balances traveler experience, partner economics, and platform health.  This is a senior individual contributor role with high autonomy. You'll own end-to-end method development initiatives, influence product strategy at the executive level, and set technical standards for causal inference across the organization. You'll collaborate closely with ML engineers, data scientists, analysts, and product leaders who value rigorous econometric thinking.In this role, you will: Build scalable econometric models (panel data methods, DiD, RDD, IV) to measure elasticity, changes in supplier behavior, and customer lifetime value in the presence of endogeneity, simultaneity, and platform dynamics  Establish the technical roadmap for long-term impact measurement, moving beyond short-term experiment metrics to quantify sustained effects on customer retention, partner engagement, and marketplace equilibrium  Design and execute causal measurement frameworks for marketplace interventions, including geo experiments, difference-in-differences, synthetic controls, and instrumental variable approaches, to isolate the true causal effect of product changes  Partner with ML teams to integrate causal inference into production systems, informing ranking algorithms, pricing optimization, and recommendation engines with econometrically validated insights  Translate complex econometric findings into clear executive narratives that drive multi-million-dollar product decisions, presenting to executive stakeholders with clarity and conviction  Mentor data scientists and economists across the organization, elevating the rigor of causal reasoning and experimental design  Experience and Qualifications:  PhD in Economics, Applied Economics, Econometrics, Statistics, or a related quantitative field  8+ years of relevant professional experience  Solid foundation in microeconomic theory and applied econometrics, with the ability to apply appropriate causal inference techniques  Demonstrated experience applying econometric methods to real-world business problems in tech, e-commerce, or marketplace environments  Deep expertise in the causal inference toolkit: IV, DiD, RDD, synthetic controls, panel data methods, experimental design, metalearners, doubleML, causal forests Proficiency in Python or R with strong SQL skills to work with large-scale, noisy, real-world data, including the ability to query and process data Track record of influencing product strategy or business decisions through rigorous quantitative analysis—ideally with examples of work that shipped to production  Exceptional communication skills: ability to explain econometric methodology, identifying assumptions, and business implications to non-technical executives  Ability to work in a fast-paced business environment Preferred Qualifications  Publications or working papers in applied economics, econometrics, or quantitative methods (academic or industry venues)  Experience with marketplace or platform economics: two-sided markets, network effects, dynamic pricing, or general equilibrium modeling  Experience integrating causal models into ML pipelines or production systems  Familiarity with modern AI/ML workflows and LLM-assisted analysis tools  Background in travel, e-commerce, or large-scale consumer marketplaces  #LI-MC1The total cash range for this position in Seattle is $173,000.00 to $242,500.00. Employees in this role have the potential to increase their pay up to $277,000.00, which is the top of the range, based on ongoing, demonstrated, and sustained performance in the role.Starting pay for this role will vary based on multiple factors, including location, available budget, and an individual’s knowledge, skills, and experience. Pay ranges may be modified in the future.Benefits and perksExpedia Group offers benefits and perks designed to support employees and their families, including medical, dental, and vision coverage, paid time off, an Employee Assistance Program, wellness and travel reimbursement, travel discounts, and International Airlines Travel Agent Network (IATAN) membership. Learn more about life at Expedia Group at .Accommodation requestsExpedia Group is committed to providing an inclusive and accessible recruiting experience. If you need an accommodation or adjustment due to a disability during the application or recruiting process, please submit a request at .About Expedia GroupExpedia Group includes three flagship consumer brands - Expedia, Hotels.com, and Vrbo - along with a leading B2B travel business and travel advertising offerings. Across our brands and business, we help travelers explore the world with confidence and ease.Important noticeEmployment opportunities and job offers at Expedia Group will always come from Expedia Group's Talent Acquisition and hiring teams. Never share sensitive personal information unless you are confident of the recipient. Expedia Group does not extend job offers via email or messaging tools to individuals with whom we have not made prior contact. Our email domain is @expediagroup.com. The official place to find and apply for roles is .Equal OpportunityExpedia is committed to creating an inclusive work environment with a diverse workforce. All qualified applicants will receive consideration for employment without regard to race, color, religion, gender, gender identity or expression, sexual orientation, national origin, genetics, disability, age, veteran status, or any other characteristic protected by law. This employer participates in E-Verify. The employer will provide the Social Security Administration (SSA) and, if necessary, the Department of Homeland Security (DHS) with information from each new employee's I-9 to confirm work authorization.SummaryLocation: Washington - Seattle CampusType: Full time