Welcome to Four Sigmas, LLC – a trusted partner in unclaimed property, R&D tax credit, and statistical consulting. Four Sigmas specializes in stratified statistical sampling, providing expert support to unclaimed property, tax, government, and legal professionals. We excel in tackling challenges that arise when existing data becomes difficult to interpret, or when sampling methods are misapplied, offering solutions that enhance clarity and bullet-proof the samples.
Dr. Ivan Tasic established Four Sigmas in May 2021. He is a seasoned economist with over 15 years of diverse experience across economic consulting, industry, and academia. With a Ph.D. in Economics from Texas A&M University and a basic certification in unclaimed property from UPPO, he brings a powerful blend of technical expertise and business insight to every project. His career spans roles at PwC, Duff & Phelps, United Airlines, and NERA Economic Consulting, where he consistently delivered innovative solutions to complex problems, mentored diverse teams, and communicated technical concepts with clarity to executives. His experience comprises consulting projects in close to 50 distinct industries.
At Four Sigmas, we believe in the power of statistics to reveal hidden opportunities and drive strategic decisions. Whether we’re building new statistical models, repairing flawed samples while preserving already-examined records, or guiding clients through audits and compliance challenges, our mission is to empower clients with the tools and knowledge to engage confidently in critical discussions.
Discover how Four Sigmas can help you turn your data into meaningful, actionable insights. Let’s unlock the beauty of statistics together.