Where does drag collide?

The component of the force on a body moving through a fluid that acts parallel to the motion and opposes it: as air or water flows over the surface, pressure differences and friction add up to a force that slows the body down. Anderson's Fundamentals of Aerodynamics (1984 and later editions) sets out how this force divides into pressure or form drag, skin friction from the thin boundary layer, and, on a lifting wing, induced drag tied to the trailing vortices, and how it is scaled by a dimensionless drag coefficient. The referent is a physical force measured on a moving body, not an inflation effect that raises a taxpayer's bill, and not a style of theatrical gender performance.[1]

Unit

A retarding force on a moving body, in newtons, or as a dimensionless drag coefficient

Recovery means

Not applicable

Measured by

Found in a wind tunnel or tow tank from a force balance, or computed from the pressure and shear distribution over the surface

In public finance, the way inflation and real income growth quietly push taxpayers into higher tax brackets and past fixed allowances, raising the average tax burden even though no law has changed: because thresholds are often set in money terms, rising nominal incomes creep across them. Immervoll's 2005 study Falling up the stairs measured this effect, known as bracket creep, across household incomes and showed how much revenue and redistribution it can shift with no legislated change at all. The referent is an automatic effect on taxes and incomes, not a mechanical force on a moving body, and not a form of gender performance.[2]

Unit

The extra real tax burden from unindexed thresholds, as a share of income or revenue

Recovery means

Reversed when brackets and allowances are indexed to inflation or adjusted by new legislation

Measured by

Estimated with tax-benefit microsimulation, comparing an indexed tax schedule against an unindexed one over time

In gender and performance studies, the deliberate and often exaggerated theatrical performance of gender, as when a performer styles and presents a gender other than the one they were assigned, in traditions such as drag queens and drag kings. Newton's 1972 ethnography Mother Camp documented female impersonators in the United States, and Butler's 1990 Gender Trouble drew on drag to argue that gender is enacted through repeated performance rather than fixed by nature. The referent is a cultural and artistic practice examined by scholars, not a retarding force in a fluid, and not an inflation effect on taxes.[3][4]

Unit

A staged performance of gender by a performer or troupe

Recovery means

Not applicable

Measured by

Studied through ethnography, interviews, performance analysis, and archival and historical research