# Was life expectancy at birth in the EU in 2015 about 100 years?

The paper "Living too long" by Guy C Brown published in 2015 has the following paragraph:

Human life expectancy has been increasing at a rapid rate. Better health care and hygiene, healthier life styles, sufficient food and improved medical care and reduced child mortality mean that we can now expect to live much longer than our ancestors just a few generations ago. Life expectancy at birth in the EU was about 69 years in 1960 and about 80 years in 2010, which corresponds to a rate of increase in life expectancy of 2.2 years per decade. If this rate of increase remains unchanged, as it has for the last century, then someone born in the EU today would be expected to live about 100 years.

My calculation of the life expectancy of someone born in the EU in 2015, based on the statement that "Life expectancy at birth in the EU was about 69 years in 1960 and about 80 years in 2010, which corresponds to a rate of increase in life expectancy of 2.2 years per decade." was approximately 81.1 years which is not "about 100 years".

Could the explanation be that "someone born in the EU today would be expected to live about 100 years" is not equivalent to "life expectancy at birth in the EU is about 100 years"? Or have I made some other error?

• are you asking us to check the math? or what do you mean by "invalid conclusion" Commented Jun 3, 2021 at 21:08
• It uses "about" - meaning approximately - three times in the "math" part. Do you see the figures as "approximately" incorrect then? Commented Jun 3, 2021 at 21:49
• Likely reading about different ways life expectancy can be defined will help, see en.wikipedia.org/wiki/Life_expectancy for example. It's perhaps also worth noting that this isn't really a conclusion of the paper, just an interpretation of some figures presented in the introductory section. Commented Jun 3, 2021 at 22:32
• @SecurityEveryDay still need clarification of what exactly you are asking Commented Jun 3, 2021 at 22:43
• @aaaaasaysreinstateMonica I edited the question. Is it clear what I am asking now? Commented Jun 3, 2021 at 23:19

The source does not make the claim "2015 life expectancy at birth in the EU will be 100 years". It makes a more vague statement "would be expected to live about 100 years". There could be an error, but more likely this is simply a discrepancy between period and cohort life expectancy, and the author assumes readers will recognize the distinction.