Where does cordon collide?

In transport economics, a cordon is a boundary drawn around a congested area, typically a city centre, at which drivers are charged to cross, so that cordon pricing uses a ring of charge points to curb traffic entering the zone. Akiyama, Mun, and Okushima's 2004 Second-best congestion pricing in urban space: Cordon pricing and its alternatives analyses how well such a ring approximates the ideal congestion toll. The referent is a pricing-and-boundary scheme on a road network, and it is a different construct from a public-health quarantine line or a political coalition taboo that share the word.[1]

Unit

The location of the charging ring and the toll levied to cross it

Recovery means

Not applicable

Measured by

Assessed by traffic reduction inside the cordon, welfare gain, and closeness to the first-best congestion toll

In public health, a cordon sanitaire is a barrier placed around an area with an outbreak to stop people, and therefore disease, from moving in or out, an old containment tactic revived in modern epidemics. Wan and colleagues' 2020 discussion of the Wuhan cordon sanitaire during COVID-19 examines its use as a non-pharmaceutical intervention. The referent is a geographic disease-containment barrier; the political meaning of the phrase (below) is, in our reading, a deliberate metaphor borrowed from this one.[2]

Unit

The sealed perimeter restricting movement into and out of an infected area

Recovery means

The cordon is lifted once transmission inside the area is brought under control

Measured by

Judged by movement restricted across the line and the effect on case importation and exportation

In party politics, a cordon sanitaire is an agreement among mainstream parties to exclude a stigmatised party, typically a far-right or anti-immigration one, from coalitions and cooperation, quarantining it from power. Van Spanje and Van Der Brug's 2007 The party as pariah studies how such exclusion affects the ostracised party. The referent is a strategy of political isolation that borrows the epidemiological term by analogy (that borrowing is our reading), and it is a different construct from a tolled traffic ring or a sanitary barrier.[3]

Unit

The set of parties refusing coalition or cooperation with the ostracised party

Recovery means

The cordon breaks down if mainstream parties begin cooperating with the excluded party

Measured by

Assessed by whether other parties rule out coalition or cooperation, and for how long