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= ACES LQ Implementation Interface Requirements =

== User options when invoking and running ACES Linear Quadratic approximation ==
Those user optinos need to be provided as a part of ACES LQ integration and its interface with Dynare. When not specified as interactive it is expected to be provided as a part of the model file model specification.

||'''Option'''||'''Meaning and description'''||'''Poss./Def. val (in bold)'''||'''Ineractive [1]'''||
||planner_discount || as currently used in Ramsey || 0.1-0.99 || ||
||instruments||as currently used in Ramsey || || ||
||use_aces_lq_solver || option to invoke ACES LQ unless separate application used || || ||
||aceslq_seedvar||Choice of variable(s) that characterises the initial guess of the steady state of the state – used in the MATLAB steady state solver (may differ from the choice of the instrument) || User choice||    ||
||aceslq_lambda_w|| search Relaxation weight – used in the main work of relaxation method (MATLAB_LQ) || 0.5|| M||
||aceslq_maxiter||Maximum number of relaxation iteration || 500|| M||
||aceslq_accuracy||	Accuracy used to compare real numbers (ACES)||A small real number e.g. 1E-6|| ||
||aceslq_ubound||Specifies the upper bounds in the NAG search (ACES)||	User’s choice as an option if ibound=0|| ||
||aceslq_lbound||Specifies the lower bounds in the NAG search (ACES)||	User’s choice as an option if ibound=0|| ||
||aceslq_igrid||Used to ask for a grid search in SIM (ACES) – SETGD subroutine required if igrid=0||1 – grid search not required but user must provide the exact values of coefficients used in the simple rule||F&M||
||aceslq_ITMAX_OPT||max no of iteration in OPT  (ACES)||	20	|| ||
||aceslq_ITMAX_TCT||max no of iteration in TCT  (ACES)||	5000	|| ||
||aceslq_ITMAX_SIM||max no of iteration in SIM  (ACES)||	1000	|| ||
||aceslq_SIM_search_step_size||optional initial_SIM search step_size||	0.5||F&M||
||aceslq_min_SIM_search_step_size|| optional minimal SIM search step_size||0.01||F&M||
||Choose Optimiser||Choose Optimiser or exit || ||M||
||  || '''Expected for later releases:'''  || ||  ||
||aceslq_MCMC_model|| model to be used in Optimal Simple Robust Rules function:i.e. original estimation model name for the MCMC draws|| <model_name> || ||
||aceslq_MCMC_selection_method||Choose selection method: random || '''random''' or fixed|| ||
||aceslq_MCMC_draw_interva|| for Fixed:  what draws to select interval|| 10|| ||
||aceslq_MCMC_draw_number|| how many ||5000|| ||
||aceslq_MCMC_start_end||	and from which end: options|| start or '''end'''  || ||


Notes 
[1]: M-Matlab only, F&M- Fortan and Matlab