I have read through the grooming report from the Home Office.
Here, in this thread, I will take you through the mathematical hoops they have jumped through in this deeply flawed analysis.
Thread 👇
One way to force a conclusion is to only range over a small and carefully chosen set of data points. In this case, the report used a limited number of use cases which largely ignored the high profile grooming gangs of Pakistani origin.
A typical data trick is to only use one troublesome dataset - generally the most high profile one. This gives plausible denial on accusations of manipulation of source data.
A tautology is a statement which is true by virtue of its logical form. I.e. a statement which is inevitably true. Such statements are not worth declaring as they have no statistical significance.
In a broadly white country, this statement is tautological. The real question is, were other groups present in a statistical significant way?
The whole point of data analysis is to uncover statistically significance results - not to restate tautologies.
This trick does, however, produce lovely quotable headlines which will reassure people of their own anecdotal conclusions.
_This is what we call “the pericope trick”_
Whenever you don’t want to use a data item, you can just blame data quality. In this case, they often cited data quality on ethnicity classifications.
The UK ethnicity enumeration is flawed in many areas.
In any given set of statements, there will be a range of values. Each item in the range will then have a corresponding frequency count. So some items might be present once and others hundreds of times.
_This is what we call “the range trick”_
A final trick I will mention is to mix-up the definition of data types and classes. You can, for example, deliberately use nationality in place of ethnicity when it suits your cause.
_This is what we call “the predicate trick”_
More from Economy
On Jan 6, 2021, the always stellar Mr @deepakshenoy tweeted, this:
https://t.co/fa3GX9VnW0
Innocuous 1 sentence, but its a full economic theory at play.
Let me break it down for you. (1/n)
On September 30, 2020, I wrote an article for @CFASocietyIndia where I explained that RBI is all set to lose its ability to set interest rates if it continues to fiddle with the exchange rate (2/n)
What do I mean, "fiddle with the exchange rate"?
In essence, if RBI opts and continues to manage exchange rate, then that is "fiddling with the exchange rate"
RBI has done that in the past and has restarted it in 2020 - very explicitly. (3/n)
First in March 2020, it opened a Dollar/INR swap of $2B with far leg to be unwound in September 2020.
Implying INR will be bought from the open markets in order to prevent INR from falling vis a vis USD (4/n)
The Second aspect is now, that dollar inflow is happening, and the forex reserves swelled -> implying the rupee is appreciating, RBI again intervened from September, by selling INR in spot markets. (5/n)
https://t.co/9kpWP7ovyM
https://t.co/fa3GX9VnW0
Innocuous 1 sentence, but its a full economic theory at play.
Let me break it down for you. (1/n)
91 day TBills at 3.03%. Interest rates are even lower than RBI has them.
— Deepak Shenoy (@deepakshenoy) January 6, 2021
On September 30, 2020, I wrote an article for @CFASocietyIndia where I explained that RBI is all set to lose its ability to set interest rates if it continues to fiddle with the exchange rate (2/n)
What do I mean, "fiddle with the exchange rate"?
In essence, if RBI opts and continues to manage exchange rate, then that is "fiddling with the exchange rate"
RBI has done that in the past and has restarted it in 2020 - very explicitly. (3/n)
First in March 2020, it opened a Dollar/INR swap of $2B with far leg to be unwound in September 2020.
Implying INR will be bought from the open markets in order to prevent INR from falling vis a vis USD (4/n)
The Second aspect is now, that dollar inflow is happening, and the forex reserves swelled -> implying the rupee is appreciating, RBI again intervened from September, by selling INR in spot markets. (5/n)
https://t.co/9kpWP7ovyM