Atom Feed newHire, Field EffectiveStartDate

Summary:

Hi All.

In the atom feed entries there are two fields, "Effective Date" and "Effective Start Date".

Please, can someone explain to me what the difference between them is?

I've seen that both fields have different values when the hired person comes from recruiting or when the person is rehired,

But I'm not sure how the Effective Start Date is obtained

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