David Castillo

Dataset guides and site methods

1. [1] Dataset documentation · DOL OFLC. LCA public disclosure record layout (FY2026 Q3). Pages 1–4: application, DOL outcome and dates, requested positions, employer, representatives, worksites and pay unitsThis layout covers determinations issued October 1, 2025 through June 30, 2026. It documents employer-provided application fields and DOL decisions, not USCIS decisions, payroll verification, legal bills or worker-linked moves. Older layouts can differ.Checked 2026-10-17.
2. [2] Dataset documentation · BLS. OEWS technical notes (May 2025). Scope of the survey; occupational coding; concepts and estimation methodologyDocuments occupation and geographic wage estimates, not an individual worker’s pay. Use the estimate year and geography stated by the site; older releases can differ.Checked 2026-10-17.
3. [3] XH1B method or registry · XH1B. State Corporate Registries (Registered Agents): source registry; Calculation and Matching Methods; Reading Public Records and Derived Indicators. Source registry entry: state-sos; Filing units, annualization, weighting, wage comparisons, and inference limits; Reading records: units, source coverage, wage gaps, entity links, and inference limitsXH1B dataset description: Registered-agent and registered-office fields identify who receives legal notices. Texas, for example, permits registered-agent service companies to represent businesses. Shared agent or address details are review leads. They do not, by themselves, establish shared ownership, a shell company, or a violation. State rules vary.; These are the site's review methods, not validated predictions of wrongdoing. Inspect underlying records and alternative explanations.
4. [4] Law or rulemaking · U.S. Securities and Exchange Commission. Schedule 14A: directors, officers and security ownership. Schedule 14A, Items 6(d) and 7: security-ownership and director/executive-officer disclosuresDefines proxy disclosure requirements. A filing describes a stated period or date. An omitted name does not establish a departure. A site identity match does not establish ownership or current service.Checked 2026-10-18.
5. [5] Guidance · SEC. Form 4: Statement of Changes in Beneficial Ownership. March 2026 revision; page 1 relationship boxes; pages 2–3 holdings/transactions; instructions 1(c) and 4A reporting-person role differs from a numeric holding. One issuer filing can contain multiple transaction rows.Checked 2026-10-18.
6. [6] Guidance · Texas Secretary of State. Registered Agents FAQs. What is a registered agent?; Who can be a registered agent?; registered-agent service companiesA registered agent receives legal notices. A service company can represent unrelated entities. Shared agent details do not, by themselves, establish shared ownership or misconduct. Other states have their own rules.Checked 2026-10-08.
7. [7] XH1B method or registry · XH1B. Displacement Model and Assumptions. Eligibility, requested-position weighting, scopes, WARN matching, and counting limitsModel outputs are estimates. A matched layoff notice does not prove that an H-1B worker replaced a laid-off worker.
8. [8] XH1B method or registry · XH1B. Downstream Research and Methods. Study populations, parameter bounds, baselines, and expected outcomes; linked model card