how prices happen, why firms behave the way they do, and the weather every business lives in.
Jagan Gopinathmentor · business economics
day 1 · monday
what is an economy actually made of?
cold open
a ₹20 bottle of bisleri.
the same bottle costs ₹120 at the airport. same water, same bottle, same brand. so what exactly are you paying for? and where does the ₹20 go after it leaves your hand?
the circular flow of income
your spending is someone's income
follow the ₹20: shopkeeper's margin, distributor's cut, driver's wage, Bisleri's profit, a worker's salary. the loop never stops.
the definition
an economy is an aggregate of transactions.
millions of small trades like yours, added up. nothing more mystical than that.
supply & demand
the two curves behind every price
stand at Chambakkara fish market at 6am and watch this graph run live: big catch, prices fall by breakfast. small catch, they climb by the minute.
movement vs shift
two very different ways a curve changes
price changes move you along the curve. everything else, a festival, a rival, a rumour, moves the curve itself.
day 2 · tuesday
what does it cost, and what will they pay?
you can now see the transaction. today we open it up: the hidden costs inside, and the hidden value on top.
consumer surplus
the gap between worth and paid
running late, you'd have paid ₹150 for that auto. the meter said ₹80. the ₹70 you kept is consumer surplus. every good business hunts that gap.
marginal cost
the cost of one more
one more dosabatter, gas, two minutes of the cook's time. real money every single plate.
one more software userone more login on a server already running. almost zero. this asymmetry builds giants.
opportunity cost
the best alternative you gave up
the stall owner says his shop is free because he owns it. it isn't. its real cost is the salary he'd earn doing something else with those twelve hours. every choice is priced by the road not taken.
elasticity
how demand bends when price moves
₹12 chai goes to ₹15grumbling, then everyone pays. demand barely moves.
₹12 chai goes to ₹25half the crowd walks to the next stall. demand snaps.
elasticity II
elastic vs inelastic, four products
INELASTICpetrolthe tank gets filled at ₹95 or ₹110. you need to get to work.
INELASTICsaltdoubling the price changes nothing. it's ₹25 a kilo either way.
ELASTICmovie ticketsat ₹500 the multiplex empties. the same film streams in a month.
ELASTICswiggy orderssurge fees on, and dinner becomes maggi at home.
fixed vs variable
break-even, on one chart
rent is due whether you sell zero dosas or five hundred. the question every founder must answer: how many units until the orange line crosses?
economies of scale
why big gets cheaper
Amul collects from 3.6 million farmers on one network. the milk run that ruins a small dairy's margins is a rounding error at that volume.
day 3 · wednesday
who sets the price, and what game are they playing?
costs explain the floor of a price. today: everything firms do above that floor.
price discrimination
same product, different prices
train classessleeper, 3AC, 1AC. same train, same time, same destination. three prices.
airline seatsthe person beside you paid half. they booked on a tuesday, six weeks out.
student pricingspotify knows a student's ₹59 is better than their ₹0.
game theory · 1 of 3
your best move depends on their move
two firms, one market. neither can price in a vacuum: every decision is a reply to the rival's last decision, and a bet on their next one.
pending jagan's confirmation
game theory · 2 of 3
the bidding war
bid aggressivewin the asset, maybe overpay so badly the win becomes the loss. the winner's curse.
bid safeprotect your money, watch the rival own the market's crown jewel for five years.
proposed India-first case: the IPL media-rights auction. swap to Jagan's Sony Blu-ray vs Toshiba HD-DVD if he prefers his original.
pending jagan's confirmation
game theory · 3 of 3
the discount war
both discountriders win, both firms burn cash for years. sound familiar?
both hold priceboth profit. but the first one to break gets the whole market's attention.
proposed India-first case: Ola vs Uber, 2015 to 2019. swap to Jagan's Netflix vs Amazon Prime if he prefers his original.
pending jagan's confirmation
the prisoner's dilemma
why both firms end up worse off
uber discounts
uber holds
ola discounts
both burn cashthe equilibrium nobody wants, everyone reaches
ola grabs shareuber bleeds riders
ola holds
uber grabs shareola bleeds riders
both profitbut neither trusts the other to stay here
individually rational, collectively ruinous. the dominant strategy traps both.
pending jagan's confirmation
market structures
one spectrum, three stops
perfect competitionchai stallshundreds of sellers, identical product, nobody sets the price
oligopolytelecomthree players who watch each other's every move
monopolyrailwaysone seller. the price is whatever the seller decides it is
market failure
when the market alone gets it wrong
the delivery bike gets your biryani to you in 20 minutes. the traffic, the fumes and the risk it creates are paid by everyone on that road, and priced by no one. externalities: costs the transaction pushes onto people who never agreed to it.
day 4 · thursday
what weather is every business living in?
you can now read any firm's pricing. today we zoom all the way out, to the forces no firm controls.
the market's memory
nifty since 2000
four storms in 26 years. every business you'll ever run lives on this line whether it knows it or not.
what is GDP
one country's total spending
C + I + G + NX
C · consumptionyour family's groceries
I · investmenta new factory in Coimbatore
G · governmenta highway through Kerala
NX · net exportscashews out, crude oil in
nominal vs real
inflation eats the headline
a 12% revenue jump in a 6% inflation year is a 6% business. always ask which number you're being shown.
let's look at the real thing
fred.stlouisfed.org
live now: the actual data, the actual charts, the actual weather.
monetary policy
RBI's one dial
the repo rate is the price banks pay RBI for money. turn it down and loans get cheap everywhere. turn it up and the whole economy feels the squeeze.
cheap money becomes risk money
how 2021 happened
rates near zero2020 to 21. money in the bank earns nothing
→
capital hunts returnsif safety pays 0%, risk suddenly looks reasonable
→
the funding floodrecord venture money chases Indian startups at any valuation
hold this chain. it runs in reverse too, and that reverse is thursday afternoon's India Lens.
inflation
what 7.8% CPI does to a business
every input quietly reprices: fuel, packaging, the warehouse worker's lunch. your fulfilment cost creeps up monthly while your price list stays printed. inflation is a tax on standing still.
two levers
fiscal vs monetary
fiscal · the government
taxes and spending
budgets, subsidies, highways
moves slowly, parliament required
aimed at sectors and people
monetary · the RBI
the price and supply of money
repo rate, liquidity
moves fast, six reviews a year
aimed at the whole economy at once
day close
every micro decision from monday to wednesday lives inside this weather.
the firm chooses the price. the economy chooses the mood.
day 5 · friday
what is the rupee doing to your business?
USD-INR
what the number means
₹87 to the dollar is not a scoreboard of national pride. it is the exchange rate between two economies' realities, and it moves your costs whether you trade abroad or not.
who wins when the rupee weakens
the exporters
the kollam cashew exportersells in dollars, pays wages in rupees. every rupee the currency slips is margin gained overnight.
the spice shipperkochi pepper priced in dollars gets cheaper for the world without cutting a single rupee of price.
who loses. and who does both
the other side of ₹87
the importerelectronics, machinery, crude: every container costs more rupees than last quarter.
the student abroadthe same US tuition fee, quietly ₹4 lakh more expensive than at admission.
the gulf remittance familydirhams convert to more rupees at home. but the kerala grocery bill inflates too. both directions at once.
jagan's charts
the dollar's own story
jagan's USD slides, restyled into this system once his source charts arrive. the DXY constituents breakdown stays trimmed unless he insists: our fellows know exporters and remittance families, not index weightings.
pending jagan's confirmation
week close
you can now read a business, and its weather.
mission showcase at 14:00. bring your business, and everything this week gave you to read it with.
the school of future