Table 2.

Intervention policies

Policy	Description	Parameter Values
No intervention	No food or ITN	${\mathit{\varphi }}_0^c$ fixed, ${\mathit{\varphi }}_t^{(1)}={\mathit{\varphi }}_t^{(2)}=0$,
		${\mathit{\varphi }}_a^1=\frac{\mathit{\alpha }}{1-\mathit{\alpha }}{\mathit{\varphi }}_0^c,{\mathit{\varphi }}_N=2\mathit{\alpha }{\mathit{\varphi }}_0^c$,
Targeted food	Food if WAZ $<\mathit{\theta }$	$p_I=1$, ${\mathit{\varphi }}_0^c$ fixed, ${\mathit{\varphi }}_t^{(1)}={\mathit{\varphi }}_t^{(2)}=P(Z<\mathit{\theta })$,
		${\mathit{\varphi }}_a^1=\frac{\mathit{\alpha }}{1-\mathit{\alpha }}{\mathit{\varphi }}_0^c,{\mathit{\varphi }}_N=2\mathit{\alpha }{\mathit{\varphi }}_0^c$,
		$P(G=11|Z=z,G_0=1)=1_{\{z>\mathit{\theta }\}}$,
		$P(G=12|Z=z,G_0=1)=1_{\{z<\mathit{\theta }\}}$,
		$P(G=21|Z=z,G_0=2)=1_{\{z>\mathit{\theta }\}}$,
		$P(G=22|Z=z,G_0=2)=1_{\{z<\mathit{\theta }\}}$
Untargeted ITN	ITN with probability $\mathit{\varphi }$ if unprotected	$p_I=p,{\mathit{\varphi }}_0^c$ fixed, ${\mathit{\varphi }}_t^{(1)}=\mathit{\varphi },{\mathit{\varphi }}_t^{(2)}=0,f_A(a)=\mathit{\delta }(a)$,
		${\mathit{\varphi }}_a^1=\frac{\mathit{\alpha }}{1-\mathit{\alpha }}({\mathit{\varphi }}_0^c+(1-{\mathit{\varphi }}_0^c)\mathit{\varphi }),{\mathit{\varphi }}_N=2\mathit{\alpha }({\mathit{\varphi }}_0^c+(1-{\mathit{\varphi }}_0^c)\mathit{\varphi })$,
		$P(G=11|Z=z,G_0=1)=1-\mathit{\varphi }$,
		$P(G=12|Z=z,G_0=1)=\mathit{\varphi }$,
		$P(G=21|Z=z,G_0=2)=1$,
		$P(G=22|Z=z,G_0=2)=0$
Targeted ITN	ITN if WAZ $<\mathit{\theta }$ and unprotected	$p_I=p,{\mathit{\varphi }}_t^{(1)}=P(Z<\mathit{\theta }),{\mathit{\varphi }}_t^{(2)}=0$, ${\mathit{\varphi }}_0^c$ fixed, $f_A(a)=\mathit{\delta }(a)$,
		${\mathit{\varphi }}_a^1=\frac{\mathit{\alpha }}{1-\mathit{\alpha }}({\mathit{\varphi }}_0^c+(1-{\mathit{\varphi }}_0^c){\mathit{\varphi }}_t^{(1)}),{\mathit{\varphi }}_N=2\mathit{\alpha }({\mathit{\varphi }}_0^c+(1-{\mathit{\varphi }}_0^c){\mathit{\varphi }}_t^{(1)})$,
		$P(G=11|Z=z,G_0=1)=1_{\{z>\mathit{\theta }\}}$,
		$P(G=12|Z=z,G_0=1)=1_{\{z<\mathit{\theta }\}}$,
		$P(G=21|Z=z,G_0=2)=1$,
		$P(G=22|Z=z,G_0=2)=0$
Targeted food and	food if WAZ $<\mathit{\theta }$,	$p_I=p,{\mathit{\varphi }}_t^{(1)}={\mathit{\varphi }}_t^{(2)}=P(Z<\mathit{\theta })$, ${\mathit{\varphi }}_0^c$ fixed,
Targeted ITN	ITN if WAZ $<\mathit{\theta }$ and unprotected	${\mathit{\varphi }}_a^1=\frac{\mathit{\alpha }}{1-\mathit{\alpha }}({\mathit{\varphi }}_0^c+(1-{\mathit{\varphi }}_0^c){\mathit{\varphi }}_t^{(1)}),{\mathit{\varphi }}_N=2\mathit{\alpha }({\mathit{\varphi }}_0^c+(1-{\mathit{\varphi }}_0^c){\mathit{\varphi }}_t^{(1)})$,
		$P(G=11|Z=z,G_0=1)=1_{\{z>\mathit{\theta }\}}$,
		$P(G=12|Z=z,G_0=1)=1_{\{z<\mathit{\theta }\}}$,
		$P(G=21|Z=z,G_0=2)=1_{\{z>\mathit{\theta }\}}$,
		$P(G=22|Z=z,G_0=2)=1_{\{z<\mathit{\theta }\}}$

The last column specifies the restrictions on the parameter values in Eqs. (4)–(6), where $1_{\{x\}}$ is the indicator function of the event x, and $\mathit{\delta }(a)$ is the Dirac delta function