mjhjmtu

Hello guys first question and beginner in LaTeX,

the following code presents part of my thesis presentation. I have no idea what i did wrong. Checked for brackets and $-signs twice. Maybe i did something wrong without knowing? This frame is the one that breaks the presentation, despite yesterday everything worked fine. Hope someone can help me.

The errors:

Missing $ inserted. endframe
Display math should end with $$. endframe
Missing $ inserted. endframe
Missing $ inserted. endframe
Bad math environment delimiter. endframe
You can't use 'eqno' in internal vertical mode. endframe´
Missing $ inserted. endframe
Display math should end with $$. endframe
Undefined control sequence. endframe
Undefined control sequence. endframe

The code:

documentclass [draft=on,t,compress,11pt,xcolor=dvipsnames]beamer
usethemedefault
usepackageamsmath
usepackagetikz, graphicx
usepackagelmodern % <--- those two packages help when you use
usepackage[T1]fontenc % the default font LaTeX font

begindocument

beginframeExplanation of the Papers Regression Function for Modern 
versus Traditional Manufacturing 

vspace-1cm
beginequation
%beginmultline

ln(wage_jn) =beta_1 S_n+beta_2 x I^M_j+gamma_1h_n+gamma_2h_n x 
I^M_j+delta_1boldsymbolX_n+delta_2boldsymbolX_n x 
I^M_j+alpha_j\
+alpha_n +xi_jn

%endmultline
endequation



vspace+0.5cm beginitemize
item $ln(wage_jn)$ = Proxy for firm productivity. 
item$S_n$ = Represents proxies for knowledge elites in location n.
item $I^M_j$ = Indicator variable that takes on value 1 if sector j is 
glqq modern grqq.
item$h_n$ = Denotes proxies for average human capital, such as literacy 
and schooling.
item$boldsymbolX_n$ = Vector of control variables.
item $alpha_j$ and $alpha_n$ = Sector fixed effects ($alpha_j$) and 
location fixed effects ($alpha_n$).
item$xi_n$ = Error term.
enditemize

endframe


enddocument

The main problem: You must not have empty lines within equation

Some further comments:

• you don't need usethemedefault, as the name says it is loaded by default




• you don't need usepackgegraphicx with beamer




• to split your equation over multiple lines, you can for example use beginsplit...endsplit




• are you misusing x for multiplication?




• the syntax for items is item text (without )




• glqq and grqq are not defined in your code.




• use ln for logarithm (Thanks to @Mico for spotting this!)

 documentclass[draft=on,t,compress,11pt,xcolor=dvipsnames]beamer
%usethemedefault
usepackageamsmath
usepackagetikz%, graphicx}
usepackagelmodern % <--- those two packages help when you use
usepackage[T1]fontenc % the default font LaTeX font

begindocument

beginframe
frametitleExplanation of the Papers Regression Function for Modern versus Traditional Manufacturing

beginequation
beginsplit
ln(textwage_jn) =beta_1 S_n+beta_2 times I^M_j+gamma_1h_n+gamma_2h_n times I^M_j+delta_1boldsymbolX_n+\
delta_2boldsymbolX_n times I^M_j+ alpha_j +alpha_n +xi_jn
endsplit
endequation

beginitemize
item $ln(textwage_jn)$ = Proxy for firm productivity. 
item $S_n$ = Represents proxies for knowledge elites in location n.
item $I^M_j$ = Indicator variable that takes on value 1 if sector j is ``modern''.
item $h_n$ = Denotes proxies for average human capital, such as literacy and schooling.
item $boldsymbolX_n$ = Vector of control variables.
item $alpha_j$ and $alpha_n$ = Sector fixed effects ($alpha_j$) and location fixed effects ($alpha_n$).
item$xi_n$ = Error term.
enditemize

endframe

enddocument