[manarth]

The Economist recommends "eg" (no full-stops) in its style-guide[1]. As does the Guardian/Observer[2], and the University of Cambridge[3].

There are counter-examples, such as AP and NYT, but this usage - without full-stops - is not uncommon or abnormal.

[1] http://www.economist.com/style-guide/abbreviations

[2] https://www.theguardian.com/guardian-observer-style-guide-e

[3] https://www.cam.ac.uk/brand-resources/guidelines/editorial-s...