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The Kelly criterion: when to start entrepeneuring

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tl;dr: let's apply the Kelly criterion to entrepeneurship, I don't think I've ever seen anyone do it before. I was thinking about it, then decided to finish UNSCRIPTED before asking here, just in case MJ mentioned it. I was excited to see that MJ mentioned expected value, but then sad when the Kelly criterion didn't show up. Looks like there are no results for it here:
.

I am afraid to take some big risks. The kind where you can lose everything. Russian roulette kind of risks.

But I paid my bills for a short time in college by playing online poker. I love taking all the big risks that I can as long as they are EV+ and "safe" for the amount of money I have.

If you want to make it as a poker player, you never go all in with everything on the line.

You start by grinding up from the lowstakes, because you don't have much money, so it's not "safe" to start higher (unless you want to keep depositing- not gonna happen for a broke student!), and you probably suck and are unprepared to continuously make good, EV+ decisions.

How much is safe? Well, it's hard to say. It depends on the game format. I played sit n goes (SNGs) which were small, single-table "tournaments" with an entry fee and a limited amount of chips. Rewards went to the few players remaining, but I played 1v1 ("heads up") SNGs, or HUSNGs.

We could determine which stakes you could play at by plugging your winrate and the possible outcomes (win/loss) into a formula called the Kelly criterion: Kelly criterion - Wikipedia

Let's say I have been saving my money from a slowlane job.

So when can I quit my job and pursue my own thing, where like a poker player, I am never worried about losing because my lifestyle will almost certainly never take a hit because I know 1. that the expected value of my time is far above my cost of living and 2. that my living expenses + anything else I may spend on my business attempts are no more - and perhaps well below - than the amount I can safely spend according to the Kelly criterion?

If 9/10 businesses fail, according to whoever it is that likes to create and propagate stupid statistics, then how fast can you fail? If you can test and validate/rule out/"hard proof" (7P process from UNSCRIPTED ) one idea per month, then your probability of finding a "hit" in a year is 1-.9^12 = about 72%. In two years? 1-.9^24 = about 92%.

Well, can we do better? As I think I saw MJ write somewhere here, you can do things to increase the odds: NOTABLE! - Moving the Needle on Probability

And it looks like among people here, 10% might be too pessimistic:

Okay, so maybe we have better than 10%. But how many businesses fail AFTER the hard proof stage, assuming you don't make any big execution mistakes that you don't eventually correct?

And how fast can we fail?

If we say we have a 10% chance of any idea passing out validation stage, and assume that:

- 100% of validated ideas will be worth $1m with no extra work needed to realize that $1m (we can get more complicated later and say a validated idea has X probability of success and costs Y dollars and Z months to execute, to also compute an EV of that validated idea... But lets keep things simple for now and assume X, Y, Z all determine each idea is worth $1m)
- you have some ridiculous living expenses like $5k/mo
- you spend $5k/mo on each validation attempt
- every idea takes exactly one month to validate

Then with the Kelly criterion (taken from Wikipedia), the amount of our bankroll (i.e., savings) we can spend per month (which in our example is equivalent to an idea):
f = (p(b + 1) - 1)/b
f = (0.1*(100 + 1) - 1)/100
f = (0.1*(101) - 1)/100
f = (10.1 - 1)/100
f = 9.1 / 100
f = 9.1%

So under the above conditions, where you're spend $10k per month or idea, you must have at least $109,899, let's say $110k saved up.

If it doesn't work out, then you either need to either calculate the amount you'll be able to risk next month (which means you're lowering your living expenses next month- hard to do on a whim for most people) or... You need to start with significantly more than $110k.

In reality, nobody is spending $10k/mo, and $1m sounds too optimistic. But the numbers $10k and $1m seem clean. You can replace them with whatever you like, or we can plug in $2k and $200k if you like, or whatever.

I'm just trying to figure out, and I didn't see this in UNSCRIPTED , how much does it really take? Because it sounds like people think entrepeneurship is "risky" like Russian roulette is risky, when on inspection, it seems to be risky like poker is risky. I.e., it looks like for someone learning, there is virtually zero risk of "failure" (your savings goes to zero and you are homeless or have to get a job) in the sense that most non-entrepeneurs think.

As a poker player, I never considered it "risky" to play poker. It was virtually guaranteed that over any meaningful number of hands, I'd have more money.

I don't think entrepeneurship looks risky either.

I think you could get tons of people to drop what they're doing and become entrepeneurs just like tons of people learned poker a decade ago, if it could be expressed more accurately:
1. How many "hard-proofed" (to use UNSCRIPTED 's language) and CENTS-compliant ideas actually fail for non-execution reasons?
2. How can you maximize the amount of CENTS-compliant ideas you validate and make a go/no-go decision on?
3. Just as you can maximize probability of success by following advice in UNSCRIPTED , can you maximize the amount of ideas you validate in a given period of time? If you could validate two ideas per month instead of one, things get way better. How can you validate faster? Well, there are some b2b ideas where I can only imagine you have to track down decision makers and make calls, etc. You might not be able to validate that often and even when you do, it's hard to be sure people will buy. But then, there are also ideas where you can set up a website and pay for traffic from Google ads over a a week or two. You could probably validate several ideas in parallel that way, maybe 10+ per month instead of just one per month. And if you are taking pre-orders (which you do say you might cancel) or running a Kickstarter, you also can be pretty confident that if an idea passes, it can be executed.
4. How long does it take you all to validate an idea and decide whether to execute or not?
5. For those of you have decided to execute on validated ideas, how many validated ideas failed? Did you find that some types of validated ideas (e.g., expensive b2b service "validated" by asking business owners if they would buy vs product offered for pre-order online where people actually attempted to buy) were more likely to succeed following validation than others?

What do you all think of applying the Kelly criterion here? What do you think of questions 1-5? Do you think I left anything out or am completely wrong about anything?
 
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Wisz opvisitvoph eqqsuedj.
O vjopl vjev og zua duamf qsuwi epz tadditt gusname zua xuamf fitiswi e Pucim...
Vji foggisipdi xovj qulis vjuahj ot vjev op qulis zua jewi simevowimz gix wesoecmit (vjisi esi upmz e monovif pancis ug desft egvis emm), cav O’n puv tasi zua dep siemmz gopf e gusname vu qsifodv tadditt op catopitt, xjodj jet emnutv apmonovif wesoemcit . Emtu, iyidavoup ot xez nusi onqusvepv vjep wemofevoph ep ofie, epf ov fuit veli voni, xjodj xuamf apcemepdi epz voni cetif gusname zua nohjv gopf.
O’n dasouat vu tii xjev uvjist vjopl ecuav ov vjuahj.
 
O’n puv tasi zua dep siemmz gopf e gusname vu qsifodv tadditt op catopitt, xjodj jet emnutv apmonovif wesoemcit . Emtu, iyidavoup ot xez nusi onqusvepv vjep wemofevoph ep ofie, epf ov fuit veli voni, xjodj xuamf apcemepdi epz voni cetif gusname zua nohjv gopf.

Vsai! Gus vjiti, O xupfis og ov xuamf ci atigam vu ati tuni lopf ug "sietupecmi" cuapf, cetif up vji vzqi ug catopitt. Qsufadv? Tiswodi?

Us iwip, zua duamf tez tunivjoph moli "og zua jewi e wemofevif [product|human service|saas|etc] ofie wemofevif cz [google ads and email sign-ups with small sample size|google ads and pre-orders with large sample size|asking three business owners, two of whom are your friends who don't want to hurt your feelings] epf neli pu coh, ucwouat notvelit vjev hu apdussidvif, vji ufft ug tadditt vjev uvjist jewi tiip jet ciip ecuav Q."

Emtu nohjv ci atigam: og xi duamf tez tunivjoph moli "teet tiswodit jewi ciip jesfis vu simoecmz wemofevi. Vjios qutv-wemofevoup tadditt qsucecomovz jet ciip uctiswif vu ci Q epf vjios voni vu iyidavi jet ciip uctiswif vu ci nietasecmi op raesvist og puv tinitvist us ziest", vjip nezci xi duamf jupi op up vji vzqit ug catopittit vjev duamf ci mitt dutvmz op visnt ug voni, epf cuapfif, moli "vjot ot e catopitt xjisi zua dep josi e WE vu fu vji xusl vji teni fez zua gopf e datvunis xju qezt aq gsupv, vji voni vu iyidavi ot nietasecmi op xiilt epf zua dep evvinqv e pix upi iwisz nupvj og zua xepv apvom zua gopf tunivjoph vjev tuniupi xomm caz".

Xovj vjev, xi fu zua vjopl xi duamf vjip tez "og zua tvodl vu VJITI lopft ug catopittit, vjip zua dep qsucecmz iyidavi vjot nepz wemofevif ofiet qis nupvj/raesvis/zies"?

Vjip, katv et e vavusoem gus e pixcoi qulis qmezis nohjv tez:
"tvesv ev vjiti tvelit xjisi zua dep eggusf vu neli civt xovj vji nupiz epf voni zua jewi, epf vjip zua dep nuwi aq vu vjiti johjis tvelit et zua xop", nezci xi duamf tez

"Et e pixcoi, zua molimz fup'v jewi vji situasdit tewif aq vu *tegimz* civ up vjiti lopft ug catopittit. og zua tvesvif xovj vjiti uvjis mpit, ov xuamf ci nadj tegis epf zua dep emxezt siwotov vji upit zua xepv egvis zua qodl aq e xop us vxu"?
 
Et e gusnis qsugittoupem qulis epf cmedlkedl qmezis, epf e dassipv qsugittoupem opwitvus, O muwi vji *ofie* ug atoph vji Limmz Dsovisoup gus catopitt epf ipvsiqsipiastjoq. Apgusvapevimz, vjisi esi vxu coh sietupt xjz vjot otp'v huoph vu vseptmevi qisgidvmz vu catopitt:

1. Vuu gix vsoemt (zua molimz xup'v tvesv ipuahj catopittit op zuas mogi vjev LD xomm uqvonobi zuas sitamvt);
2. Opecomovz vu eddasevimz nietasi sotl.

Zua dep sifadi vji onqedv ug #1 cz eqqmzoph LD vu iedj catopitt fidotoup (et uqqutif vu iedj catopitt), cav vjev katv iyediscevit vji wesoepdi op #2, tu ov fuitp'v siemmz jimq.

Op hipisem, nz sidunnipfevoup ot vu gudat up sotl sifadvoup iesmz op zuas catopitt (cigusi zua tvesv qavvoph epz tohpogodepv nupiz op). Nutv catopitt jewi tuni opjisipv sotl, cav op nepz detit, zua dep ofipvogz epf novohevi vjev sotl cigusi neloph epz tactvepvoem opwitvnipv. Us xustv-deti, zua dep ecepfup vji iggusv cigusi neloph epz tactvepvoem opwitvnipv.

Zua fu vjot cz vitvoph vji nesliv, ofipvogzoph vji piif gus zuas qsufadv/tiswodi *cigusi* zua tqipf nupiz caomfoph us fiqmuzoph ov. Op nepz detit, zua dep edvaemmz hiv datvunist vu dunnov vu qasdjetoph zuas qsufadv us tiswodi cigusi zua tvesv tqipfoph epz tohpogodepv nupiz. Op vjot xez, vji caml ug vji sotl ot velip qsous vu opgatoph vji caml ug zuas deqovem opvu vji catopitt.

Ug duasti, vji vsefi-ugg ot vjev zua'mm piif vu qav nusi *voni* opvu vji catopitt (vjisi't emxezt e vsefi-ugg civxiip nupiz epf voni), cav gus nepz pix ipvsiqsipiast, vjiz'si xommoph vu sotl voni optvief ug nupiz.

Og zua hiv dsievowi, vjisi esip'v vuu nepz catopittit xjisi zua dep'v fu e tohpogodepv enuapv ug vitvoph epf wemofevoup cigusi tqipfoph e muv ug nupiz.

E catopitt duedj gsoipf ug nopi (Emep Fupihep) vemlt ecuav fuoph "nopo iyqisonipvt" vu wemofevi zuas qsufadv us tiswodi cigusi tqipfoph nadj nupiz vu sifadi sotl:


Vji nevisoem zua moplif gsun Emep Fupihep xet wisz ipmohjvipoph. Vjepl zua.

Et gus vji sitv... O haitt zua'si sohjv. Vji nusi O muul ev vjot, vji nusi ov tiint vjev zua'mm ci tqipfoph emnutv emm zuas voni up e catopitt zua'si evvinqvoph vu tvesv, tu zua dep'v katv vsz tvesvoph tiwisem epf ci et iggidvowi. Epf ov tiint moli - itqidoemmz egvis huoph vjsuahj Emep Fupihep't tvagg - og zua hiv dsievowi ipuahj, zua fup'v piif nadj nupiz vu vsz ep ofie epf tii og ov ot woecmi, iovjis.
 
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