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 Economist   Expedia 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