Producer support in Ukraine, as measured by the PSE, has been volatile over the past three decades, mostly reflecting changes in market price support (MPS). Market price support data have been revised backwards for a number of commodities, including for all grains, sugar, pig meat, poultry, and milk. Revisions relate to updated transport and processing margins, changed trade status, the choice of reference prices, and zeroing market price differentials in the absence of relevant policies. Revisions affect the whole time series since 1986, with adjustments being most significant for the years from 2013 onwards, for which MPS estimates (and, hence, PSE estimates) are less negative than before. Since 1991, MPS has been negative in most years, reflecting average producer prices below international reference levels, but with significant variation across commodities and time. Protected by import tariffs, prices for most meat products and, depending on the year, sugar, have been aligned with or above international price levels. Those for several grains, sunflower seeds and milk have generally been somewhat below reference prices. However, the impact on prices of the state-owned Agrarian Fund and the State Food and Grain Corporation activities, and the annual MoU on grain exports is likely to be limited. Due to adverse political and economic conditions, producer support overall has been negative since 2014 as budgetary support in the form of tax benefits and input support has only partly offset this overall negative MPS.