That suggests INDEC is now using some government-mandated prices rather than those that consumers actually pay.
She hints at underhand, possibly criminal, dealings between former INDEC staff, independent Argentine economists and international financiers.
In Ms Bevacqua's day, INDEC artificially boosted the inflation rate, perhaps to benefit holders of inflation-linked bonds, she claims.
The trade secretary, Guillermo Moreno, who led the assault on INDEC, is still one of the president's closest advisers.
ECONOMIST: Why we are removing a figure from our indicators page
When a product's price spikes, INDEC takes it out of the CPI basket.
Perhaps most intriguingly, INDEC's and PriceStats' inflation rates accelerate and decelerate in tandem.
That agreements between Mr Moreno and retailers to cap prices of basic products were not reflected in INDEC's calculations before 2007.
That would require INDEC to be run by independent statisticians working unhindered.
ECONOMIST: Why we are removing a figure from our indicators page
From this week, we have decided to drop INDEC's figures entirely.
ECONOMIST: Why we are removing a figure from our indicators page
That is far above the 10% reported by INDEC, the government statistics agency, but less than the 30% wage increases public employees have received in recent years.
The financial threat is especially serious for Graciela Bevacqua, who lost her job as head of INDEC in 2007 for refusing to tamper with the price index.
What seems to have started as a desire to avoid bad headlines in a country with a history of hyperinflation has led to the debasement of INDEC, once one of Latin America's best statistical offices.
ECONOMIST: Why we are removing a figure from our indicators page
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