Best microsynth3/16/2023 ![]() This allows estimated effects from the actual treatment unit to be compared to effects for the placebo treatment units, after standardization (if use.survey = TRUE), generating a new variance estimator and p-value. To generate an additional measure for significance, microsynth can generate hundreds or thousands of placebo treatment units using random permutations of the control units (e.g., with perm = 250 and jack = TRUE). This bolsters the conceptual framework behind the synthetic control method. With the advantage of a large number of smaller-scale observations, microsynth is often better able to calculate weights that provide exact matches between treatment and synthetic control units (on all variables passed to match.out and var ). Therefore, in addition to what Synth provides, microsynth offers several advantages and new tools: This package is developed to address those limitations, by incorporating high-dimensional, micro-level data into the synthetic controls framework. ![]() But the relative dearth of treatment and comparison data in such settings complicates efforts to a) develop a synthetic control that matches the treatment case, b) precisely estimate the effect of treatment, c) gauge the significance of that effect, and d) jointly incorporate multiple outcome variables. The Synth package has been developed for R and designed for this type of application. Generally, synthetic controls have been applied in the context of a single treatment case with a limited number (e.g., several dozens) of untreated cases for comparison. The advantages over the general difference-in-difference approach are several: a) the observable similarity of control and treatment cases is maximized, and perhaps also similarity of unobservables, strengthening the assumptions (e.g., equal secular trends) inherent to the difference-in-difference approach b) the method is feasible even when there exists no single untreated case adequately similar to the treatment case and c) researchers can point to a formal and objective approach to the selection of controls, rather than having to justify ad hoc decisions which could potentially create the appearance of the researcher having his thumb on the scale. By matching on the observable characteristics between treatment and control, the method may also do a better job of matching on the unobservable characteristics (though by nature this cannot be verified). Weights are calculated in order to maximize the similarity between the synthetic control and the treatment unit in terms of specified “matching” variables. Instead, the synthetic control method offers a formalized and more rigorous method for identifying comparison cases, by constructing a “synthetic” control unit that represents a weighted combination of many untreated cases. Difference-in-difference methods often require the researcher to manually identify a control case, against which the treatment will be compared, on the basis of apparent similarity before the intervention and the plausibility that identical secular trends affect both the treatment and control equally after the intervention. I guess we ought to start looking into finding the best matches for the different stages of the microsynth so that we can put together the modular microsynth upgrade.Synthetic controls are a generalization of the difference-in-difference approach (Abadie and Gardeazabal, 2003 Abadie et al, 2010). Then toss in a slow attack and some filter stuff. To get the microsynth effect right you need to be able to blend clean, octave up, octave down, and fuzz. Hell, you could put anything in the signal path anywhere you want. plus you could put the "slow gear clone" where ever in the signal path you'd like. The abilty to set the input levels for each of the effects seperately would be a huge bonus. Honestly I think a bit of a modular take on the pedal would probably give you much better results. I'm definitly a fan, but that thing has huge downsides. So to me, it is a great effect for more or less free. ![]() I got my microsynth for more or less free when I bought a package of pedals on ebay and resold most of them to cover the cost of the few I kept. It goes pretty in depth about the effect. Theblackman, have you used a microsynth? If not you ought to read this
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