{
  "industry": "Plumbing, Heating & Air-Conditioning Contractors",
  "naics": "238220",
  "metro": "Jackson, MS",
  "grain_of_margin": "national",
  "national_net_margin_pct": 15.7,
  "metro_establishments": 169.0,
  "metro_employment": 1719.0,
  "metro_avg_weekly_wage": null,
  "note": "Margin is national. Counts + wage are metro (CBSA) grain. No local margin exists."
}