What is the difference between using bc and ad as opposed to using bce and ce when describing a date?

In this video: BCE (Before Common Era) and BC (Before Christ) mean the same thing- previous to year 1 CE (Common Era). This is the same as the year AD 1 (Anno Domini); the latter means “in the year of the lord,” often translated as “in the year of our lord.

john maynard keynes developed new economic theories in response to the stock market crash of 1929. great depression of the 1930s. first and second world wars. economic boom of the 1950s.