I want to estimate the total yearly stock per country (which I only have every 5 years) with the yearly inflow.
My formula is as follows:
(S_t ) ̇=〖(1-δ)〗^5 (S_(t-5) ) ̇+〖(1-δ)〗^4 F_(t-4)+〖(1-δ)〗^3 F_(t-3)+〖(1-δ)〗^2 F_(t-2)+F_(t-1)+ μ_t
S= Stock at time t
F= inflow at time t
I was only able to find a simple linear interpolation command however I don't know how I can calculate a more complex interpolation.
Thanks in advance for your help.
[IMG]file:////Users/sofiaamorim/Library/Group%20Containers/UBF8T346G9.Office/TemporaryItems/msohtmlclip/clip_image002.png[/IMG]
My formula is as follows:
(S_t ) ̇=〖(1-δ)〗^5 (S_(t-5) ) ̇+〖(1-δ)〗^4 F_(t-4)+〖(1-δ)〗^3 F_(t-3)+〖(1-δ)〗^2 F_(t-2)+F_(t-1)+ μ_t
S= Stock at time t
F= inflow at time t
I was only able to find a simple linear interpolation command however I don't know how I can calculate a more complex interpolation.
Thanks in advance for your help.
[IMG]file:////Users/sofiaamorim/Library/Group%20Containers/UBF8T346G9.Office/TemporaryItems/msohtmlclip/clip_image002.png[/IMG]
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