Spending rising at the rate of population growth and inflation means the same amount of spending can be maintained per person in real terms over time.

FORBES: The Anachronism Of State Income Taxes

The precise ethnic groupings which exist in a State, the significance of ethnicity for social participation in societal institutions and the processes through which ethnic differentiation is constructed and maintained may vary considerably between individual States, and over time.

UNESCO: Social and Human Sciences

The force maintained "policing higher risk fixtures later in the afternoon increases the likelihood of disorder over a longer period of time and impacts upon policing the night-time economy".

BBC: Compromise over Hull City v Huddersfield travel dispute

But Mr Francis never explains why Shakerism was handed over to this woman (an extraordinary thing at the time), or exactly how her authority was maintained.

ECONOMIST: Religions in history