• using R version 4.5.1 (2025-06-13)
• using platform: x86_64-pc-linux-gnu
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• this is package ‘antitrust’ version ‘0.99.29’
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• checking examples ... [1s/1s] ERROR Running examples in ‘antitrust-Ex.R’ failed The error most likely occurred in: > base::assign(".ptime", proc.time(), pos = "CheckExEnv") > ### Name: AIDS-Functions > ### Title: (Nested) AIDS Calibration and Merger Simulation > ### Aliases: AIDS-Functions aids pcaids pcaids.nests > > ### ** Examples > > ## Simulate a merger between two single-product firms A and B in a > ## three-firm market (A, B, C). This example assumes that the merger is between > ## the firms A and B and that A's own-price elasticity is > ## known. > ## Source: Epstein and Rubinfeld (2004), pg 9, Table 2. > > > prices <- c(2.9,3.4,2.2) ## optional for aids, unnecessary for pcaids > shares <- c(.2,.3,.5) > > > ## The following are used by aids but not pcaids > ## only two of the margins are required to calibrate the demand parameters > margins <- c(0.33, 0.36, 0.44) > > ## The following are used by pcaids, but not aids > knownElast<- -3 > mktElast <- -1 > > > ## Define ownership using a vector of firm identities > ownerPre <- c("A","B","C") > ownerPost <- c("A","A","C") > > ## Alternatively, ownership could be defined using matrices > #ownerPre=diag(1,length(shares)) > #ownerPost=ownerPre > #ownerPost[1,2] <- ownerPost[2,1] <- 1 > > > ## AIDS: the following assumes both prices and margins are known. > ## Prices are not needed to estimate price changes > > > > result.aids <- aids(shares,margins,prices,ownerPre=ownerPre,ownerPost=ownerPost,labels=ownerPre) > > > > print(result.aids) # return predicted price change Warning in .local(object, ...) :   Slot 'insideSize' is missing. Calculating CV as a percentage change in (aggregate) income Warning in .local(object, ...) :   'calcQuantities' yielded all NAs. Using 'calcShares' instead Warning in .local(object, ...) :   'calcQuantities' yielded all NAs. Using 'calcShares' instead Merger simulation results under 'AIDS' demand:  HHI Change        1200  Industry Price Change (%)                        7.3  Merging Party Price Change (%)                              12  Compensating Marginal Cost Reduction (%)                                        NA  Consumer Harm ($)                7.3  Producer Benefit ($)                  0.18  Difference ($)             7.2 > summary(result.aids) # summarize merger simulation Merger simulation results under 'AIDS' demand:     pricePre pricePost priceDelta sharesPre sharesPost outputDelta * A 2.9 3.3 14 20 17 -13.2 * B 3.4 3.8 11 30 28 -6.5   C 2.2 2.3 4 50 55 9.1  Notes: '*' indicates merging parties' products.   Deltas are percent changes.  Output is based on revenues. > > elast(result.aids,TRUE) # returns premerger elasticities            A B C A -3.0303027 0.7575762 1.262627 B 0.5050508 -2.7777773 1.262627 C 0.5050508 0.7575762 -2.272727 > elast(result.aids,FALSE) # returns postmerger elasticities            A B C A -3.3370108 0.8728868 1.454025 B 0.5402877 -2.8999816 1.349594 C 0.4628976 0.6941436 -2.167141 > > diversion(result.aids,TRUE) # return premerger diversion ratios            A B C A -1.0000000 0.375 0.6250000 B 0.2857143 -1.000 0.7142857 C 0.4000000 0.600 -1.0000000 > diversion(result.aids,FALSE) # return postmerger diversion ratios            A B C A -1.0000000 0.375 0.6250000 B 0.2857143 -1.000 0.7142857 C 0.4000000 0.600 -1.0000000 > > > cmcr(result.aids) #calculate compensating marginal cost reduction Error in loadNamespace(x) : there is no package called ‘MASS’ Calls: cmcr ... loadNamespace -> withRestarts -> withOneRestart -> doWithOneRestart Execution halted
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Status: 1 ERROR