Endowment funds like the Yale one and pension funds have different objectives, that's why the asset allocations are different.
If you are trying to generate a certain amount of income every year without reducing the real value of your assets, which will survive you, invest like an endowment fund. (If you're very rich, for example.)
If you are trying to accumulate money during your working life with a view to living on it during your retirement, and if you're not too bothered about leaving something behind when you die, then invest like a pension fund.