uk_weekly: Weekly English Channel crossings (UK example)

In DynCount: Bayesian Dynamic Models for Count Time Series

Weekly English Channel crossings (UK example)

Description

A weekly count series of irregular small-boat crossings of the English Channel towards the United Kingdom, covering the ISO weeks 2018-W01 to 2025-W11 (376 weeks). The series has frequent zeros in its early weeks (43% of the first 130 weeks), which makes it a useful example for zero inflation with the Poisson model. The series is used in the irregular-migration application of Zens and Bijak (2026).

Usage

uk_weekly

Format

A data frame with 376 rows and 3 variables:

week

ISO week label, e.g. "2018-W01".

count

Non-negative integer count of weekly crossings.

date

The Monday of the ISO week, as a Date.

Source

Weekly aggregates of detected irregular English Channel crossings, compiled from operational/agency records as described in Zens and Bijak (2026), \Sexpr[results=rd]{tools:::Rd_expr_doi("10.1214/26-AOAS2171")}.

References

Zens, G. and Bijak, J. (2026). Dynamic Count Models with Flexible Innovation Processes for Irregular Maritime Migration. The Annals of Applied Statistics, 20(2), 1671–1690. \Sexpr[results=rd]{tools:::Rd_expr_doi("10.1214/26-AOAS2171")}.

Examples

plot(uk_weekly$date, uk_weekly$count, type = "h", xlab = "week", ylab = "crossings")
mean(uk_weekly$count == 0)

DynCount documentation built on Sept. 28, 2026, 5:10 p.m.