Exclude students from the SNAP unit with certain exceptions.

[PavelMakarchuk]

Fixes #4962

[CalebPena]

@PavelMakarchuk Is this pr still being reviewed?

[MaxGhenis]

Could you also clarify how this works -- are students just not in any SNAP unit if they don't meet these criteria? They can't get SNAP as their own unit either?

Do we need to make a new entity for SNAP units?

Please also check the total SNAP expenditure and participation before and after this change.

[MaxGhenis]

would work right?

Suggested change

	adds = ["spm_unit_size"]
	subtracts = ["is_snap_ineligible_student"]

[PavelMakarchuk]

I capped the formula at 0 to avoid negative values for units with just one student

[PavelMakarchuk]

Could you also clarify how this works -- are students just not in any SNAP unit if they don't meet these criteria? They can't get SNAP as their own unit either?

Do we need to make a new entity for SNAP units?

Please also check the total SNAP expenditure and participation before and after this change.

Yes as far as I understand students need to meet one of the exemption criteria:

Students attending an institution of higher education half-time or more are only eligible for SNAP if they meet an exemption. These exemptions include meeting any of the following:
Being under age 18 or being 50 or older
Working at least 20 hours a week in paid employment
Participating in a state or federally financed work study program
Having a physical or mental disability

Do we not have an entity build for spm_unit in entities.py

[CalebPena]

@MaxGhenis @PavelMakarchuk Have we made any progress on this ticket?

[PavelMakarchuk]

@MaxGhenis to answer your question above:
SNAP currently: ~$113 billion.
SNAP after this change: ~$106 billion

[MaxGhenis]

I'm still not fully convinced this is the right approach but merging as it seems to solve a pressing need.