id,name,formula,input_rows,result,unit,limitations
d1,Establishments in states where the state HVAC license is held by a person,sum(CBP 2023 NAICS 238220 est) over registry rows with scope=statewide and holder=individual,registry.csv; fact rows 1 to 51 (CBP by state),36763,establishments,Holder coded from official text; CBP 238220 includes plumbing contractors
d2,Share of US HVAC and plumbing establishments in person-held license states,d1 / total CBP 2023 NAICS 238220 establishments (51 jurisdictions) x 100,d1; fact row 52,33.1,percent,Same as d1; establishment counts exclude nonemployers
d3,"Establishments in states where the state license depends on a named qualifier or licensee (person-held, qualifier-based or threshold)","sum(est) over rows with tile code 5, 4 or 2",registry.csv; fact rows 1 to 51,71481,establishments,"Excludes states whose holder type was not coded (ID, NM, WV, WI)"
d4,Share of establishments in states where the license depends on a named person,d3 / total est x 100,d3; fact row 52,64.3,percent,As d3
d5,"Median days to replace a departed qualifier, across states whose text states a window",median of deadline_days over rows with a coded deadline,t3_qualifier_deadlines.csv,75,days,"12 states only; 0 = must stop contracting; TN three months coded as 90; Virginia excluded (60-day reporting deadline, no replacement window)"
d6,Establishment-weighted median replacement window,"weighted median of deadline_days, weights = CBP 2023 est",t3_qualifier_deadlines.csv,90,days,Weighted by establishments in the deadline states only
d7,States whose text states a qualifier replacement window,count of rows with a coded deadline,registry.csv,12,states,Other licensing states may set a window in rules we did not open
d8,"Establishments in states that require stopping work immediately when the qualifier leaves (AL, GA)",sum(est) over rows with deadline_days = 0,t3_qualifier_deadlines.csv,4748,establishments,Two states
d9,Establishments in states with a stated window,sum(est) over rows with a coded deadline,t3_qualifier_deadlines.csv,40324,establishments,As d7
d10,Share of establishments in states with no state HVAC contractor license found,est(tile 0) / total est x 100,t2_license_type_establishments.csv,28.4,percent,Not found is not proof of absence; see excluded.md
d11,States with a deadline of 60 days or less,count of coded deadlines <= 60,t3_qualifier_deadlines.csv,6,states,As d7
d12,Share of person-dependent establishments in person-held states,d1 / d3 x 100,"d1, d3",51.4,percent,As d1
d13,Establishments in qualifier-based statewide states,sum(est) over rows with tile code 4,registry.csv,28802,establishments,As d1
d14,Share of establishments in qualifier-based statewide states,d13 / total est x 100,d13; fact row 52,25.9,percent,As d1