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        "Ian Helfrich"
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        "geospatial"
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      "type": "paper",
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        "Ian Helfrich"
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        "trade",
        "gravity",
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        "satellite-economics",
        "panel-data"
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    {
      "type": "paper",
      "title": "Occlusion and adaptation: a closed-loop spatial-labor model of Ukraine's wartime economic reorganization, 2022-2025",
      "year": 2026,
      "status": "Active development · no results yet",
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      "authors": [
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        "Elizaveta Gonchar"
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      "authors": [
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      "type": "paper",
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      "authors": [
        "Ian Helfrich"
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      "authors": [
        "Ian Helfrich"
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      "authors": [
        "Ian Helfrich"
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        "satellite-economics",
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        "shadow-trade"
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      "type": "paper",
      "title": "Empirical observation equilibria: the Russian seaborne-crude corridor, 2021-2024",
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      "status": "Active development · no results yet",
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      "authors": [
        "Ian Helfrich"
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        "satellite-economics",
        "empirical-OT"
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      "authors": [
        "Ian Helfrich",
        "Shane Vardanyan"
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        "artificial-intelligence",
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        "cps",
        "early-career"
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        "Ian Helfrich"
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        "teaching data",
        "econometrics",
        "open data",
        "interactive"
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        "Ian Helfrich"
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        "trade",
        "networks",
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        "Ian Helfrich"
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        "investment",
        "GIS",
        "regional economics",
        "public finance"
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        "Ian Helfrich"
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        "panel-data"
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      "title": "Rebuilding the research site",
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      "summary": "How Astro and Pagefind connect my research, datasets, and teaching sites.",
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      "summary": "An edited version of the introduction to my former WordPress research blog.",
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        "archive"
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      "summary": "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.",
      "tags": [
        "observatory",
        "statistics",
        "teaching",
        "census",
        "spatial"
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      "repo": "https://github.com/ihelfrich/american-policy-atlas"
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      "title": "Applied Statistics",
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      "status": "live",
      "summary": "An open, executable methods library connecting estimands, derivations, software parity, diagnostics, identification boundaries, and defensible communication.",
      "tags": [
        "statistics",
        "econometrics",
        "open education",
        "reproducibility"
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      "status": "in-progress",
      "summary": "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.",
      "tags": [
        "climate",
        "finance",
        "geospatial",
        "risk"
      ],
      "url": "https://ihelfrich.github.io/projects/climfinrisk/"
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      "type": "tool",
      "title": "Counting, Factually",
      "date": "2026-09-12T00:00:00.000Z",
      "status": "live",
      "summary": "An open, living book on causal inference and the logic of quantitative evidence, with a browser data lab and provenance-tracked teaching datasets.",
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        "causal inference",
        "econometrics",
        "research design",
        "open education",
        "interactive learning",
        "open data"
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      "status": "in-progress",
      "summary": "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.",
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        "quantitative-modeling",
        "teaching",
        "causal-inference",
        "interactive-book"
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      "title": "EffDist V2026",
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      "status": "in-progress",
      "summary": "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.",
      "tags": [
        "dataset",
        "geospatial",
        "trade",
        "networks"
      ],
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      "type": "tool",
      "title": "LiDAR & 3D GIS portfolio",
      "date": "2026-10-16T00:00:00.000Z",
      "status": "live",
      "summary": "Classified LiDAR, terrain diagnostics, marine survey design and an interactive Haiti terrain mesh, with each artifact's data type, provenance and limits stated.",
      "tags": [
        "LiDAR",
        "3D GIS",
        "terrain analysis",
        "survey design",
        "cartography"
      ],
      "url": "https://ihelfrich.github.io/gis-portfolio/"
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      "type": "tool",
      "title": "Hidden Rivers",
      "date": "2026-10-07T00:00:00.000Z",
      "status": "live",
      "summary": "Explore deep ocean currents, Amazon waters and reefs through an interactive globe, satellite spectra and scientific maps.",
      "tags": [
        "oceanography",
        "geospatial analysis",
        "scientific visualization",
        "remote sensing",
        "Sentinel-2",
        "PCA"
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      "status": "in-progress",
      "summary": "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.",
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        "macro",
        "python",
        "numba",
        "FRED"
      ],
      "url": "https://ihelfrich.github.io/projects/macro-research-tools/"
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      "type": "tool",
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      "date": "2026-09-10T00:00:00.000Z",
      "status": "in-progress",
      "summary": "3D bathymetry, geographic data, current-field visualization, and acoustic model integration for survey planning support.",
      "tags": [
        "geospatial analysis",
        "oceanography",
        "scientific visualization",
        "acoustics"
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      "type": "tool",
      "title": "Pictures of Inference",
      "date": "2026-05-01T00:00:00.000Z",
      "status": "in-progress",
      "summary": "A visual textbook and workbook on statistical and econometric inference by Ian Helfrich and Elizaveta Gonchar, currently in draft.",
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        "book",
        "stats",
        "teaching"
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      "repo": "https://github.com/ihelfrich/pictures-of-inference"
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      "type": "tool",
      "title": "Spatial Investment Lab",
      "date": "2026-10-16T00:00:00.000Z",
      "status": "in-progress",
      "summary": "A national atlas of observed NMTC financing and a 3D Asheville scenario connecting investment incentives, additional employment, constrained allocation and access to jobs.",
      "tags": [
        "spatial economics",
        "investment incentives",
        "3D GIS",
        "regional development",
        "network analysis"
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      "type": "tool",
      "title": "St. Louis City & Property Lab",
      "date": "2026-10-16T00:00:00.000Z",
      "status": "live",
      "summary": "A 3D urban instrument connecting mapped buildings, official City property evidence and rental scenarios. Recorded parcel information and modeled financial assumptions remain separate.",
      "tags": [
        "GIS",
        "3D",
        "urban economics",
        "property",
        "scenario analysis"
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      "url": "https://ihelfrich.github.io/st-louis/",
      "repo": "https://github.com/ihelfrich/ihelfrich.github.io"
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    {
      "type": "tool",
      "title": "STATAverse",
      "date": "2026-01-21T00:00:00.000Z",
      "status": "live",
      "summary": "Stata practice and interactive econometrics in the browser, with checked beginner lessons, data investigations and portable do-files.",
      "tags": [
        "stata",
        "code",
        "applied-econometrics"
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      "url": "/learn/stata/",
      "repo": "https://github.com/ihelfrich/STATAverse"
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      "type": "tool",
      "title": "TeachingNotes",
      "date": "2025-07-17T00:00:00.000Z",
      "status": "live",
      "summary": "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.",
      "tags": [
        "teaching",
        "templates",
        "notes"
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      "url": "https://ihelfrich.github.io/projects/teaching-notes/",
      "repo": "https://github.com/ihelfrich/TeachingNotes"
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    {
      "type": "tool",
      "title": "U.S. New Markets Tax Credit research repository",
      "date": "2026-04-20T00:00:00.000Z",
      "status": "in-progress",
      "summary": "Public repository for the project-level New Markets Tax Credit panel, research pipeline, and Cesium viewer source supporting the rural-mobilization-gap paper.",
      "tags": [
        "dataset",
        "viewer",
        "blended-finance",
        "nmtc"
      ],
      "url": "https://ihelfrich.github.io/projects/us-nmtc-viewer/",
      "repo": "https://github.com/ihelfrich/us-nmtc-viewer"
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    {
      "type": "tool",
      "title": "Yellowjacket",
      "date": "2026-09-10T00:00:00.000Z",
      "status": "live",
      "summary": "A browser audio workbench connecting transcript editing, signal analysis, and music production.",
      "tags": [
        "audio",
        "signal processing",
        "browser tools",
        "creative software"
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      "url": "https://ihelfrich.github.io/yellowjacket/",
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