Break specification, exogeneity, homoskedasticity, independence, and normality on purpose and measure the damage
Nineteen distributions, test power, constructions of t, chi-square and F, and a department simulator for fitting models to hidden processes
Interactive slopes, logs, partial derivatives, gradients, curvature and accumulation
Solow, AK, growth traps, overlapping generations, IS-LM, New Keynesian policy, public debt and stochastic optimal growth
Open course in econometrics: twelve chapters on identification, probability, projection, research designs, measurement, dependence and decisions, with worked problems, three experiments and a teaching guide
Graduate course, first edition: fifteen lectures on forecasting, ARMA, state-space models, VARs, cointegration and volatility, with lecture summaries, practice, projects and code in R, Julia and Python
Working handbook: three foundation chapters on economic questions, measurement and observation clocks, marked at four reading levels from orientation to complete proofs, with calculations in Python, Julia and R
Hiring, research, teaching, coaching, and applied quantitative inquiries
Tutoring, consulting, and job-market meetings, booked against Ian's open calendar times
Candidate page for the 2026–27 economics job market: fields, paper, availability
Papers, programs, methods, data, and current questions
University teaching, online instruction, independent tutoring, and quantitative research-design coaching
Case studies in econometrics, spatial systems, and interactive evidence
Executive resume, academic CV, career summary, availability, and contact
Working analytical instruments with methods and decision context
Essays and notes on evidence, measurement, and teaching
Education, current practice, leadership, and service
Software, viewers, teaching systems, and research infrastructure
Spatial investment, LiDAR and terrain work, and geospatial applications, with data types and limits stated
Public datasets and release records with provenance
Papers, data, essays, and tools in one searchable record
Stata practice in the browser, guided data preparation, regression and sampling labs, and reproducible do-files
Economics course practice, diagnostic sessions, worked explanations, and course directory
The independent research venture Ian is building with Elizaveta Gonchar, Ph.D.
Interactive probability distributions, test power, constructions of t, chi-square and F, and a department simulator for fitting models
Interactive map of every page and the links between them, with routes for hiring committees, students, and collaborators
Ocean transport, flow diagnostics, Tessera coastal search, and a reproducible 3D film
How this site works: the homepage solver's mathematics, the motion doctrine, the stack
Nationwide spatial investment geography: observed New Markets Tax Credit (NMTC) financing, 8,439 projects and $71.019 billion in QLICI, 2001–2023 origination
Classified LiDAR, terrain diagnostics, survey design, and an interactive Haiti terrain mesh
Conditional 3D scenario of incentive offers, additional jobs, and road-network job access in Asheville, NC
Elizaveta Gonchar, Ian Helfrich · Preprint
Elizaveta Gonchar, Ian Helfrich · Active development · no results yet
Ian Helfrich, Elizaveta Gonchar · Active development · no results yet
Ian Helfrich · Published dissertation
Ian Helfrich · Public working paper
Ian Helfrich · Work in progress
Ian Helfrich · Job market paper
Ian Helfrich · Active development · no results yet
Ian Helfrich, Shane Vardanyan · Active development · no results yet
released · Per dataset; recorded in the public catalogue
in-progress · Not yet assigned
released · U.S. public-domain CDFI Fund and Census Bureau source data; source attribution retained
in-progress · CC-BY-4.0 (project data); CDFI Fund source data is U.S. public domain
How Astro and Pagefind connect my research, datasets, and teaching sites.
An edited version of the introduction to my former WordPress research blog.
live · A teaching observatory for statistics built on every U.S. county. Scrollytelling modules walk from a single map to spatial autocorrelation, empirical-Bayes shrinkage, and a California redlining flagship, each with the live numbers and a grounded research-assistant panel.
live · An open, executable methods library connecting estimands, derivations, software parity, diagnostics, identification boundaries, and defensible communication.
in-progress · Models for the analysis of physical and financial risks linked to geospatial climate exposures. A toolkit for combining IPCC scenario gridded data with bank-balance-sheet and insurance-portfolio exposures.
live · An open, living book on causal inference and the logic of quantitative evidence, with a browser data lab and provenance-tracked teaching datasets.
in-progress · An open econometrics course connecting empirical questions, formal theory, reproducible experiments, and defensible decisions. Twelve compact chapters, three interactive investigations, and a teaching and workshop guide.
in-progress · A planned global gridded effective-distance dataset using population grids and settlement layers. In progress with Dr. Elizaveta Gonchar; no completed public release is claimed.
live · Classified LiDAR, terrain diagnostics, marine survey design and an interactive Haiti terrain mesh, with each artifact's data type, provenance and limits stated.
live · Explore deep ocean currents, Amazon waters and reefs through an interactive globe, satellite spectra and scientific maps.
in-progress · Python toolkit for macroeconomic research with Numba-accelerated FRED pipelines and structural-VAR scaffolding. Built for the kind of empirical macro work where the data engineering eats the analyst's day.
in-progress · 3D bathymetry, geographic data, current-field visualization, and acoustic model integration for survey planning support.
in-progress · A visual textbook and workbook on statistical and econometric inference by Ian Helfrich and Elizaveta Gonchar, currently in draft.
in-progress · A national atlas of observed NMTC financing and a 3D Asheville scenario connecting investment incentives, additional employment, constrained allocation and access to jobs.
live · A 3D urban instrument connecting mapped buildings, official City property evidence and rental scenarios. Recorded parcel information and modeled financial assumptions remain separate.
live · Stata practice and interactive econometrics in the browser, with checked beginner lessons, data investigations and portable do-files.
live · The running back-of-the-notebook archive: working LaTeX, Quarto, and Python templates for the courses I teach and tutor through. Intermediate micro and macro, econometrics, finance, math-for-econ.
in-progress · Public repository for the project-level New Markets Tax Credit panel, research pipeline, and Cesium viewer source supporting the rural-mobilization-gap paper.
live · A browser audio workbench connecting transcript editing, signal analysis, and music production.
Probability, estimation, regression, diagnostics, causal inference, and visual reasoning
Identification, measurement, panel methods, specification strategy, and reproducibility
Analytical programming, data workflows, query design, debugging, and code review
Principles, theory, game theory, market structure, managerial economics, and policy
Principles, intermediate models, money, growth, international macro, and live public data
Quantitative decision models, finance, competitive analysis, market research, and communication
Spatial analysis, remote sensing, public datasets, geographic measurement, and mapping
No record matches that query.
Short paths through the site, depending on what you need.
Public index of all research, data, projects, and writing