M D r , s = M B A S E r , s ∗ ( 1 + ( P R I r , s , t − 1 ∗ E X R A T E r − M P R I C r , s M P R I C r , s ∗ e l a s t r p r s ) ) e l m p r 1 ∗ ( 1 + ( P R I r , s , t − 1 ∗ E X R A T E r − M P R I C r , s M P R I C r , s − P R I r , s , t − 2 ∗ E X R A T E r , t − 1 − M P R I C r , s , t − 1 M P R I C r , s , t − 1 ∗ e l a s t r p r s ) ) e l m p r 2 {\displaystyle MD_{r,s}=MBASE_{r,s}*(1+({\frac {PRI_{r,s,t-1}*EXRATE_{r}-MPRIC_{r,s}}{MPRIC_{r,s}}}*\mathbf {elastrpr} _{s}))^{elmpr1}*(1+({\frac {PRI_{r,s,t-1}*EXRATE_{r}-MPRIC_{r,s}}{MPRIC_{r,s}}}-{\frac {PRI_{r,s,t-2}*EXRATE_{r,t-1}-MPRIC_{r,s,t-1}}{MPRIC_{r,s,t-1}}}*\mathbf {elastrpr} _{s}))^{elmpr2}}
2 3 {\displaystyle {\frac {2}{3}}}
s u b r e g i o n v a l u e [ b a s e ] ∑ s u b r e g i o n v a l u e s [ b a s e ] ∗ c o u n t r y v a l u e {\displaystyle {\frac {subregionvalue[base]}{\sum {subregionvalues[base]}}}*countryvalue}
![{\displaystyle {\frac {subregionvalue[base]}{\sum {subregionvalues[base]}}}*countryvalue}](https://wikimedia.org/api/rest_v1/media/math/render/svg/85b1f35314c398b283dc5bf210462aa97efe1f19)